| Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract] | Period [Axis] |
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2015-05-01 - 2016-04-30 |
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Defined Benefit Pension Plans and Defined Benefit Postretirement Plans Disclosure [Abstract] | |
Schedule of Net Benefit Costs [Table Text Block] | Net periodic pension cost for 2016 and 2015 was comprised of the following components (in thousands): | | | Year Ended April 30, | | | | | 2016 | | 2015 | | | | | | | | | | | | Interest cost on projected benefit obligation | | $ | 1,284 | | $ | 1,370 | | | Expected return on assets | | | (2,051) | | | (2,230) | | | Plan expenses | | | 251 | | | 247 | | | Recognized net actuarial loss | | | 1,534 | | | 1,257 | | | Settlement loss | | | - | | | 1,067 | | | Total cost recognized in pretax income | | | 1,018 | | | 1,711 | | | Cost recognized in pretax other comprehensive income | | | 434 | | | 2,674 | | | Net periodic pension cost | | $ | 1,452 | | $ | 4,385 | | |
Schedule of Assumptions Used [Table Text Block] | The estimated net loss, transition obligation and prior service cost for the pension plan that will be amortized from accumulated other comprehensive income into net periodic pension cost over the next fiscal year are $1,603,000, $0 and $0. Assumptions used in determining net periodic pension cost and the benefit obligation were: | | | Year Ended April 30, | | | | | 2016 | | | 2015 | | | | | | | | | | | | | Discount rate used to determine net periodic pension cost | | | 3.48 | % | | | 3.90 | % | | Discount rate used to determine pension benefit obligation | | | 3.27 | % | | | 3.48 | % | | Expected long-term rate of return on assets | | | 8.00 | % | | | 8.00 | % | |
Schedule of Benefit Obligations in Excess of Fair Value of Plan Assets [Table Text Block] | The following table sets forth changes in the pension plan’s benefit obligation and assets, and summarizes components of amounts recognized in the Company’s consolidated balance sheet (in thousands): | | | April 30, | | | | | 2016 | | 2015 | | | Change in benefit obligation: | | | | | | | | | Benefit obligation at beginning of year | | $ | 38,303 | | $ | 36,469 | | | Interest cost | | | 1,284 | | | 1,370 | | | Actuarial (gain) loss | | | (750) | | | 5,098 | | | Benefits paid | | | (2,419) | | | (4,634) | | | Benefit obligation at end of year | | $ | 36,418 | | $ | 38,303 | | | | | | | | | | | | Change in plan assets: | | | | | | | | | Fair value of plan assets at beginning of year | | $ | 27,044 | | $ | 29,120 | | | Company contributions | | | - | | | 475 | | | Actual return on plan assets | | | (620) | | | 2,334 | | | Benefits paid | | | (2,419) | | | (4,634) | | | Plan expenses | | | (297) | | | (251) | | | Fair value of plan assets at end of year | | $ | 23,708 | | $ | 27,044 | | | Underfunded status: | | $ | (12,710) | | $ | (11,259) | | | | | | | | | | | | Recognition of underfunded status: | | | | | | | | | Accrued pension cost | | $ | (12,710) | | $ | (11,259) | | |
Schedule of Net Periodic Benefit Cost Not yet Recognized [Table Text Block] | The funded status of the pension plan is equal to the net liability recognized in the consolidated balance sheet. The following table summarizes the amounts recorded in accumulated other comprehensive loss, which have not yet been recognized as a component of net periodic pension costs (in thousands): | | | Year Ended April 30, | | | | | 2016 | | 2015 | | | Pretax accumulated comprehensive loss | | $ | 18,061 | | $ | 17,627 | | |
Schedule of Defined Benefit Plan Amounts Recognized in Other Comprehensive Income (Loss) [Table Text Block] | The following table summarizes the changes in accumulated other comprehensive loss related to the pension plan for the years ended April 30, 2016 and 2015 (in thousands): | | | Pension Benefits | | | | | Pretax | | Net of Tax | | | | | | | | | | | | Accumulated comprehensive loss, May 1, 2014 | | $ | 14,953 | | $ | 9,175 | | | Net actuarial gain | | | 4,998 | | | 3,099 | | | Recognition of settlement loss | | | (1,067) | | | (662) | | | Amortization of net loss | | | (1,257) | | | (779) | | | Accumulated comprehensive loss, April 30, 2015 | | | 17,627 | | | 10,833 | | | Net actuarial loss | | | 1,968 | | | 1,220 | | | Amortization of net loss | | | (1,534) | | | (952) | | | Accumulated comprehensive loss, April 30, 2016 | | $ | 18,061 | | $ | 11,101 | | |
Schedule of Allocation of Plan Assets [Table Text Block] | The average asset allocation for the pension plan by asset category was as follows: | | | April 30, | | | | | 2016 | | | 2015 | | | Equity securities | | | 67 | % | | | 69 | % | | Fixed income securities | | | 28 | | | | 29 | | | Other (principally cash and cash equivalents) | | | 5 | | | | 2 | | | Total | | | 100 | % | | | 100 | % | |
Schedule of Changes in Fair Value of Plan Assets [Table Text Block] | The following tables set forth by level within the fair value hierarchy the pension plan’s assets at fair value as of April 30, 2016 and 2015 (in thousands): | 2016: | | | | | | | | | | | | | | | | | Total | | Level 1 | | Level 2 | | Level 3 | | | Cash and cash equivalents | | $ | 1,171 | | $ | 1,171 | | $ | - | | $ | - | | | Investments at fair value: | | | | | | | | | | | | | | | Equity securities | | | 15,878 | | | 15,878 | | | - | | | - | | | Corporate bonds and debentures | | | 6,663 | | | - | | | 6,663 | | | - | | | Total assets at fair value | | $ | 23,712 | | $ | 17,049 | | $ | 6,663 | | $ | - | | | 2015: | | | | | | | | | | | | | | | | | Total | | Level 1 | | Level 2 | | Level 3 | | | Cash and cash equivalents | | $ | 675 | | $ | 675 | | $ | - | | $ | - | | | Investments at fair value: | | | | | | | | | | | | | | | Equity securities | | | 18,634 | | | 18,634 | | | - | | | - | | | Corporate bonds and debentures | | | 7,735 | | | - | | | 7,735 | | | - | | | Total assets at fair value | | $ | 27,044 | | $ | 19,309 | | $ | 7,735 | | $ | - | | |
Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block] | A summary of the 2015 and 2016 restricted share award activity presented below represents the maximum number of shares that could be vested: | Restricted time-based share awards | | Number of
Shares | | Weighted Average
Grant Date
Fair Value | | | Non-vested at April 30, 2014 | | | 24,000 | | $ | 6.96 | | | Granted during 2015 | | | 12,000 | | | 6.90 | | | Vested during 2015 | | | (8,000) | | | 6.80 | | | Forfeited during 2015 | | | - | | | - | | | Non-vested at April 30, 2015 | | | 28,000 | | | 6.98 | | | | | | | | | | | | Granted during 2016 | | | 3,000 | | | 5.22 | | | Vested during 2016 | | | (12,000) | | | 6.94 | | | Forfeited during 2016 | | | - | | | - | | | Non-vested at April 30, 2016 | | | 19,000 | | $ | 6.66 | | |