Consolidated Statements of Stockholders' Equity (USD $) In Thousands	Total	Capital Stock, Common	Additional Paid-in Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Loss
Balance at Dec. 31, 2009	$ 367,670	$ 907	$ 439	$ 371,650	$ 0	$ (5,326)
Net income	62,216	0	0	62,216	0	0
Other comprehensive income, net of tax	2,245	0	0	0	0	2,245
Dividends on common stock	(97,944)	0	0	(97,944)	0	0
Stock-based Compensation	0
Balance at Dec. 31, 2010	334,187	907	439	335,922	0	(3,081)
Net income	69,932	0	0	69,932	0	0
Other comprehensive income, net of tax	0	0	0	0	0	0
Dividends on common stock	(7,148)	0	0	(7,148)	0	0
Repurchases of common stock	(56,350)	0	0	0	(56,350)	0
Stock-based Compensation	150	0	150	0	0	0
Balance at Dec. 31, 2011	340,771	907	589	398,706	(56,350)	(3,081)
Net income	61,541	0	0	61,541	0	0
Other comprehensive income, net of tax	1,797	0	0	0	0	1,797
Dividends on common stock	(91,934)	0	0	(91,934)	0	0
Repurchases of common stock	(24,190)	0	0	0	(24,190)	0
Stock-based Compensation	2,379	0	2,379	0	0	0
Balance at Dec. 31, 2012	$ 290,364	$ 907	$ 2,968	$ 368,313	$ (80,540)	$ (1,284)