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

Reporting Entity [Axis]

0000897077 (http://www.sec.gov/CIK)

Income Tax Disclosure [Abstract]	Period [Axis]
	2016-01-01 - 2016-12-31
Income Tax Disclosure [Abstract]
Schedule of Income before Income Tax, Domestic and Foreign	The jurisdictional components of income before taxes consist of the following:     December 31, (in thousands)   2016   2015   2014 Income before income taxes:             Domestic   $ 44,446   $ 52,313   $ 43,345 Foreign   17,743   14,554   17,260     $ 62,189   $ 66,867   $ 60,605
Schedule of Components of Income Tax Expense (Benefit)	The components of income tax expense (benefit) consist of the following:     December 31, (in thousands)   2016   2015   2014 Current:             Domestic   $ 11,958   $ 13,293   $ 13,495 Foreign   5,491   4,614   3,382 State   2,075   2,947   2,685     19,524   20,854   19,562 Deferred:                Domestic   1,580   3,481   (600 ) Foreign   934   (718 )   540 State   106   41   (48 )     2,620   2,804   (108 ) Total income taxes   $ 22,144   $ 23,658   $ 19,454
Schedule of Effective Income Tax Rate Reconciliation	The difference between income tax expense (benefit) for financial statement purposes and the amount of income tax expense computed by applying the domestic statutory income tax rate of 35% to income before income taxes consists of the following:       December 31, (in thousands)   2016   2015   2014 Domestic statutory rate at 35%   $ 21,766   $ 23,403   $ 21,212 Increase (reduction) from:             Jurisdictional rate differences   (1,936 )   (2,192 )   (2,119 ) Valuation allowance   1,731   797   353 Stock based compensation   275   257   199 U.S. state taxes   1,295   1,942   1,649 Domestic production deduction   (618 )   (518 )   (1,321 ) R&D credit   (329 )   (475 )   (614 ) Other, net   (40 )   444   95 Provision for income taxes   $ 22,144   $ 23,658   $ 19,454 Effective tax rate   36 %   35 %   32 %
Schedule of Deferred Tax Assets and Liabilities	The components of the Company’s deferred income tax assets and liabilities consist of the following:     December 31, (in thousands)   2016   2015 Deferred income tax assets:           Inventory basis difference   $ 1,568   $ 2,241   Accounts receivable reserve   231   529   Depreciation   —   110   Stock based compensation   937   968   Pension liability   3,947   2,481   Employee benefit accrual   1,481   2,038   Product liability and warranty reserves   1,600   1,517   Expenses not currently deductible for tax purposes   28   60   Foreign net operating loss   3,513   2,726   State net operating loss   102   49   Other   94   194                        Total deferred income tax assets   $ 13,501   $ 12,913               Less: Valuation allowance   (3,382 )   (1,651 )                            Net deferred income tax assets   $ 10,119   $ 11,262           Deferred income tax liabilities:           Inventory basis differences   $ (16 )   $ (310 )   Depreciation   (5,289 )   (4,624 )   Intangible assets   (10,046 )   (7,934 )   Deferred revenue   —   —   Expenses not currently deductible for tax purposes   (593 )   (642 )                   Total deferred income tax liabilities   $ (15,944 )   $ (13,510 )                            Net deferred income taxes   $ (5,825 )   $ (2,248 )
Schedule of Unrecognized Tax Benefits Roll Forward	December 31,     2016   2015 Balance as of beginning of year   $ 301,000   $ 388,000 Additions for tax positions related to the current year   51,000   63,000 Additions for tax positions related to prior years   —   — Reduction due to lapse of statute of limitations   (117,000 )   (150,000 ) Balance as of end of year   $ 235,000   $ 301,000