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	(20,769)	0	0	(20,769)	0	0
Exercise of stock options	277	0	(177)	454	0	0
Income tax benefit from stock-based compensation, net	66	0	66	0	0	0
Stock-based compensation expense	8,346	0	1,233	7,113	0	0
Other	996	0	197	799	0	0
Dividends paid	(14,015)	0	0	0	0	(14,015)
Unrealized loss on marketable securities, net of tax	(5)	0	0	0	(5)	0
Net income	19,840	0	0	0	0	19,840
Balance at Sep. 30, 2014	$ 248,008	$ 308	$ 136,972	$ (151,091)	$ 24	$ 261,795
Balance (shares) at Sep. 30, 2014		30,758