Consolidated Statement of Stockholders’ Equity (USD $) In Thousands, except Share data	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Balance at Dec. 31, 2010	$ 126,733	$ 279	$ 84,073	$ 42,381
Balance (in Shares) at Dec. 31, 2010		27,924
Stock-based compensation	1,139		1,139
Exercise of employee stock options for shares	1	1
Exercise of employee stock options for shares (in Shares)		181
Taxes paid for shares issued to employees	(470)		(470)
Taxes paid for shares issued to employees (in Shares)		(41)
Stock issued on vesting of RSUs	1	1
Stock issued on vesting of RSUs (in Shares)		110
Taxes paid on vesting of RSUs	(449)		(449)
Taxes paid on vesting of RSUs (in Shares)		(38)
Tax benefit from stock-based compensation	595		595
Dividends	(3,505)			(3,505)
Increase in value of marketable securities available for sale	44				44
Net income	14,733			14,733
Balance at Jun. 30, 2011	$ 138,822