CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Unaudited) (USD $) In Thousands	Total	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income [Member]	Retained Earnings [Member]
Balance at Dec. 31, 2014	$ 204,096	$ 308	$ 137,769	$ (148,465)	$ 3	$ 214,481
Balance (shares) at Dec. 31, 2014		30,758
Purchase of treasury stock, at cost	(5,719)	0	0	(5,719)	0	0
Exercise of stock options	374	0	(3)	377	0	0
Income tax benefit from stock-based compensation, net	2,697	0	2,697	0	0	0
Stock-based compensation expense	2,423	0	434	1,989	0	0
Other	285	0	66	219	0	0
Dividends paid	(4,844)	0	0	0	0	(4,844)
Unrealized gain on marketable securities, net of tax	2	0	0	0	2	0
Net income	13,787	0	0	0	0	13,787
Balance at Mar. 31, 2015	$ 213,101	$ 308	$ 140,963	$ (151,599)	$ 5	$ 223,424
Balance (shares) at Mar. 31, 2015		30,758