UNAUDITED CONDENSED CONSOLIDATED STATEMENT OF CHANGES IN STOCKHOLDERS’ EQUITY - 3 months ended Mar. 31, 2016 - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Treasury Stock
Shares at beginning of period (in shares) at Dec. 31, 2015		70,558				42,130
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance for stock-based compensation and dividends, net of forfeitures (in shares)		455
Exercise of stock options (in shares)		10
Repurchases of common stock (in shares)						1,172
Employee stock purchase plan (in shares)						(8)
Shares at end of period (in shares) at Mar. 31, 2016		71,023				43,294
Balance at beginning of period at Dec. 31, 2015	$ 139,627	$ 705	$ 420,276	$ 318	$ 155,096	$ (436,768)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuance for stock-based compensation and dividends, net of forfeitures		5	139
Exercise of stock options		0	109
Income tax benefit from stock-based compensation			285
Stock-based compensation expense			1,944
Repurchases of common stock						(21,071)
Employee stock purchase plan	192		109			83
Defined benefit pension plans, net of tax	(3)			(3)
Net income	3,650				3,650
Dividends, net of forfeitures ($0.12 per share)					(3,290)
Balance at end of period at Mar. 31, 2016	$ 121,587	$ 710	$ 422,862	$ 315	$ 155,456	$ (457,756)