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, 2013	$ 253,272	$ 308	$ 135,653	$ (138,688)	$ 29	$ 255,970
Balance (shares) at Dec. 31, 2013		30,758
Purchase of treasury stock, at cost	(14,740)	0	0	(14,740)	0	0
Exercise of stock options	253	0	(149)	402	0	0
Income tax expense from stock-based compensation, net	(2)	0	(2)	0	0	0
Stock-based compensation expense	5,645	0	863	4,782	0	0
Other	678	0	140	538	0	0
Dividends paid	(9,203)	0	0	0	0	(9,203)
Unrealized gain on marketable securities, net of tax	12	0	0	0	12	0
Net income	11,455	0	0	0	0	11,455
Balance at Jun. 30, 2014	$ 247,370	$ 308	$ 136,505	$ (147,706)	$ 41	$ 258,222
Balance (shares) at Jun. 30, 2014		30,758