Consolidated Statement of Changes in Stockholders' Equity (Unaudited) (USD $) In Thousands, except Share data		Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]
Beginning Balance, Value at Dec. 31, 2013		$ 111,330	$ 783	$ 80,718	$ 29,403	$ 426
Beginning Balance, Shares at Dec. 31, 2013		78,286,465	78,286,465
Share-based compensation recognized		1,314		1,314
Tax windfall benefit on exercises of stock options		1,937		1,937
Stock options exercised, net of cashless exercise		(690)	4	(694)
Stock options exercised, net of cashless exercise, Shares			385,636
Dividend	[1]	21		21
Net income		55,070			55,070
Cash dividends declared on common stock		(23,549)			(23,549)
Cash dividends paid on common stock, Shares
Other comprehensive loss		(6,573)				(6,573)
Ending Balance, Value at Sep. 30, 2014		$ 138,860	$ 787	$ 83,296	$ 60,924	$ (6,147)
Ending Balance, Shares at Sep. 30, 2014		78,672,101	78,672,101

[1] Related to dividend declared in 2012 and accrued upon vesting of stock options. Such options were forfeited during the nine months ended September 30, 2014.