Consolidated Statement of Stockholders' Equity (Unaudited) (USD $) In Thousands, except Share data	Total	Series A Preferred Stock [Member]	Common Stock [Member]	Additional Paid-In Capital [Member]	Retained Income [Member]	Accumulated Other Comprehensive Income, Net of Tax [Member]
Beginning Balance at Dec. 31, 2012	$ 121,253			$ 63,875	$ 55,758	$ 1,620
Beginning Balance, shares at Dec. 31, 2012		241,182	10,877,537
Net income	20,387				20,387
Total other comprehensive income, net of income taxes	165					165
Conversion of preferred stock to common stock, shares		(30,627)	30,627
Exercise of common stock options, shares
Forfeiture of restricted stock, shares			(920)
Common stock dividends	(2,454)				(2,454)
Preferred stock dividends	(34)				(34)
Tax benefits on stock-based compensation	22			22
Stock-based compensation	389			389
Ending Balance at Mar. 31, 2013	139,728			64,286	73,657	1,785
Ending Balance, shares at Mar. 31, 2013		210,555	10,907,244
Beginning Balance at Dec. 31, 2013	160,521			48,966	110,441	1,114
Beginning Balance, shares at Dec. 31, 2013		110,684	10,939,268
Net income	17,620				17,620
Total other comprehensive income, net of income taxes	1,424					1,424
Conversion of preferred stock to common stock, shares		(100,478)	100,478
Issuance of restricted stock, shares			98,720
Exercise of common stock options, value	125			125
Exercise of common stock options, shares	50,000		50,000
Forfeiture of restricted stock, shares			(505)
Repurchase and retirement of common stock, value	(353)			(353)
Repurchase and retirement of common stock, shares	(210,836)		(7,017)
Repurchase and retirement of common stock under share repurchase plan, value	(7,805)			(7,805)
Repurchase and retirement of common stock under share repurchase plan, shares			(210,836)
Deferred taxes on debt discount	215			215
Common stock dividends	(6,038)				(6,038)
Preferred stock dividends	3				3
Tax benefits on stock-based compensation	915			915
Stock-based compensation	2,085			2,085
Ending Balance at Mar. 31, 2014	$ 168,712			$ 44,148	$ 122,026	$ 2,538
Ending Balance, shares at Mar. 31, 2014		10,206	10,970,108