CONSOLIDATED STATEMENT OF STOCKHOLDERS' EQUITY (Unaudited) (USD $) In Thousands	Common Stock [Member]	Additional Paid-In Capital [Member]	Treasury Stock [Member]	Accumulated Other Comprehensive Income [Member]	Retained Earnings [Member]	Total
Balance at Dec. 31, 2012	$ 308	$ 133,207	$ (133,950)	$ 16	$ 241,324	$ 240,905
Balance (shares) at Dec. 31, 2012	30,758
Purchase of treasury stock, at cost	0	0	(13,498)	0	0	(13,498)
Exercise of stock options	0	(127)	245	0	0	118
Income tax benefit from stock-based compensation, net	0	483	0	0	0	483
Stock-based compensation expense	0	318	1,992	0	0	2,310
Other	0	17	213	0	0	230
Dividends paid	0	0	0	0	(4,349)	(4,349)
Unrealized gain on marketable securities, net of tax	0	0	0	16	0	16
Net income	0	0	0	0	13,173	13,173
Balance at Mar. 31, 2013	$ 308	$ 133,898	$ (144,998)	$ 32	$ 250,148	$ 239,388
Balance (shares) at Mar. 31, 2013	30,758