Slicers (applies to each fact value in each table cell)

Reporting Entity [Axis]

0000726601 (http://www.sec.gov/CIK)

Compensation and Retirement Disclosure [Abstract]	Period [Axis]
	2016-01-01 - 2016-12-31
Compensation and Retirement Disclosure [Abstract]
Schedule of components of pension expense, the funded status of the plan, amounts recognized in the consolidated statements of financial condition, and major assumptions	(Dollars in Thousands) 2016 2015 2014 Change in Projected Benefit Obligation: Benefit Obligation at Beginning of Year $ 141,039 $ 140,359 $ 115,285 Service Cost 6,453 6,859 5,634 Interest Cost 5,587 5,750 5,513 Actuarial Loss (Gain) 9,118 (6,880) 22,632 Benefits Paid (9,412) (4,825) (8,438) Expenses Paid (200) (224) (267) Projected Benefit Obligation at End of Year $ 152,585 $ 141,039 $ 140,359 Change in Plan Assets: Fair Value of Plan Assets at Beginning of Year $ 105,792 $ 108,172 $ 103,842 Actual Return on Plan Assets 7,633 (2,331) 8,035 Employer Contributions 10,000 5,000 5,000 Benefits Paid (9,412) (4,825) (8,438) Expenses Paid (200) (224) (267) Fair Value of Plan Assets at End of Year $ 113,813 $ 105,792 $ 108,172 Funded Status of Plan and Accrued Liability Recognized at End of Year: Other Liabilities $ 38,772 $ 35,247 $ 32,186 Accumulated Benefit Obligation at End of Year $ 130,109 $ 121,609 $ 119,750 Components of Net Periodic Benefit Costs: Service Cost $ 6,453 $ 6,859 $ 5,634 Interest Cost 5,587 5,750 5,513 Expected Return on Plan Assets (7,736) (7,820) (7,487) Amortization of Prior Service Costs 278 309 309 Net Loss Amortization 3,201 3,564 1,365 Net Periodic Benefit Cost $ 7,783 $ 8,662 $ 5,334 Weighted-Average Assumptions Used to Determine Benefit Obligation: Discount Rate 4.21% 4.52% 4.15% Rate of Compensation Increase 3.25% 3.25% 3.25% Measurement Date 12/31/16 12/31/15 12/31/14 Weighted-Average Assumptions Used to Determine Benefit Cost: Discount Rate 4.52% 4.15% 5.00% Expected Return on Plan Assets 7.50% 7.50% 7.50% Rate of Compensation Increase 3.25% 3.25% 3.25% Amortization Amounts from Accumulated Other Comprehensive Income: Net Actuarial Loss $ 9,221 $ 3,272 $ 22,083 Prior Service Cost (278) (309) (309) Net Loss (3,201) (3,564) (1,365) Deferred Tax (Benefit) Expense (2,216) 232 (7,873) Other Comprehensive Loss (Gain), net of tax $ 3,526 $ (369) $ 12,536 Amounts Recognized in Accumulated Other Comprehensive Income: Net Actuarial Losses $ 40,392 $ 34,373 $ 34,665 Prior Service Cost 488 766 1,075 Deferred Tax Benefit (15,772) (13,556) (13,788) Accumulated Other Comprehensive Loss, net of tax $ 25,108 $ 21,583 $ 21,952
Schedule of pension plan asset allocation and the target asset allocation	Target Percentage of Plan Allocation Assets at Year-End(1) 2017 2016 2015 Equity Securities 70 % 66 % 68 % Debt Securities 25 % 20 % 20 % Cash and Cash Equivalents 5 % 14 % 12 % Total 100 % 100 % 100 %
Schedule of fair value of plan assets by level of the valuation inputs within the fair value hierarchy	(Dollars in Thousands) 2016 2015 Level 1: Equities $ - $ 18,197 Mutual Funds - Real Estate 4,731 3,442 Mutual Funds - Fixed Income 16,189 14,738 Mutual Funds - Equity 75,159 53,649 Cash and Cash Equivalents 15,345 12,402 Level 2: U.S. Government Agency 2,389 3,364 Total Fair Value of Plan Assets $ 113,813 $ 105,792
Schedule of expected benefit payments related to the defined benefit pension plan	Expected Benefit Payments. As of December 31, expected benefit payments related to the defined benefit pension plan were as follows: (Dollars in Thousands) 2016 2017 $ 9,190 2018 11,076 2019 10,913 2020 10,290 2021 11,748 2022 through 2026 56,735 Total $ 109,952
Schedule of amounts contributed to the pension plan and the expected amount to be contributed	2015 2016 Expected Contribution (Dollars in Thousands) 2017(1) Actual Contributions $ 5,000 $ 10,000 $ 5,000
Schedule of components of SERP's periodic benefit cost, the funded status of the plan, amounts recognized in the consolidated statements of financial condition, and major assumptions	(Dollars in Thousands) 2016 2015 2014 Change in Projected Benefit Obligation: Benefit Obligation at Beginning of Year $ 4,842 $ 3,003 $ 2,379 Service Cost - 3 - Interest Cost 162 133 104 Actuarial Loss 737 1,703 520 Projected Benefit Obligation at End of Year $ 5,741 $ 4,842 $ 3,003 Funded Status of Plan and Accrued Liability Recognized at End of Year: Other Liabilities $ 5,741 $ 4,842 $ 3,003 Accumulated Benefit Obligation at End of Year $ 4,913 $ 4,348 $ 2,982 Components of Net Periodic Benefit Costs: Service Cost $ - $ 3 $ - Interest Cost 162 133 104 Amortization of Prior Service Cost - 7 164 Net Loss (Gain) Amortization 759 179 (661) Net Periodic Benefit Cost $ 921 $ 322 $ (393) Weighted-Average Assumptions Used to Determine Benefit Obligation: Discount Rate 3.92% 4.13% 4.15% Rate of Compensation Increase 3.25% 3.25% 3.25% Measurement Date 12/31/16 12/31/15 12/31/14 Weighted-Average Assumptions Used to Determine Benefit Cost: Discount Rate 4.13% 4.15% 5.00% Rate of Compensation Increase 3.25% 3.25% 3.25% Amortization Amounts from Accumulated Other Comprehensive Income: Net Actuarial Loss $ 737 $ 1,703 $ 520 Prior Service Cost - (7) (164) Net (Loss) Gain (759) (179) 660 Deferred Tax Expense (Benefit) 8 (585) (392) Other Comprehensive Loss (Gain), net of tax $ (14) $ 932 $ 624 Amounts Recognized in Accumulated Other Comprehensive Income: Net Actuarial Loss (Gain) $ 870 $ 892 $ (632) Prior Service Cost - - 7 Deferred Tax (Benefit) Liability (336) (344) 241 Accumulated Other Comprehensive Loss (Gain), net of tax $ 534 $ 548 $ (384)
Schedule of expected benefit payments related to the SERP	(Dollars in Thousands) 2016 2017 $ 1,649 2018 2,193 2019 2,142 2020 - 2021 - 2022 through 2026 - Total $ 5,984