Consolidated Statement of Stockholders' Equity (USD $) Share data in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]		Total
Balance at Dec. 31, 2012	$ 285,000	$ 86,576,000	$ 75,118,000	$ 30,000	[1]	$ 162,009,000
Balance (in Shares) at Dec. 31, 2012	28,529
Adjustment - see Note 1			(483,000)			(483,000)
Stock-based compensation		2,155,000				2,155,000
Stock-based compensation (in Shares)	13
Stock issued on vesting of RSUs	2,000					2,000
Stock issued on vesting of RSUs (in Shares)	316
Taxes paid on vesting of RSUs		(780,000)				(780,000)
Taxes paid on vesting of RSUs (in Shares)	(107)
Dividends			(3,476,000)			(3,476,000)
Net income			22,423,000			22,423,000	[2]
Other		(79,000)		349,000	[1]	270,000
Balance at Dec. 31, 2013	287,000	87,872,000	93,582,000	379,000	[1]	182,120,000
Balance (in Shares) at Dec. 31, 2013	28,751
Stock-based compensation		3,220,000				3,220,000
Stock-based compensation (in Shares)	7
Stock issued on vesting of RSUs	2,000					2,000
Stock issued on vesting of RSUs (in Shares)	310
Taxes paid on vesting of RSUs		(1,067,000)				(1,067,000)
Taxes paid on vesting of RSUs (in Shares)	(106)
Dividends			(4,798,000)			(4,798,000)
Net income			10,219,000			10,219,000	[2]
Other		193,000		(14,000)	[1]	179,000
Balance at Dec. 31, 2014	$ 289,000	$ 90,218,000	$ 99,003,000	$ 365,000	[1]	$ 189,875,000
Balance (in Shares) at Dec. 31, 2014	28,962

[1] Accumulated Other Comprehensive Income

[2] There is no material difference between net income and comprehensive income.