CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (USD $) In Thousands, except Share data, unless otherwise specified	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Total
Balance at Dec. 31, 2011	$ 183	$ 62,455	$ 39,197	$ (1,555)	$ (117)	$ 100,163
Balance (in shares) at Dec. 31, 2011	18,320,214
Increase (Decrease) in Stockholders' Equity
Net income			25,659			25,659
Other comprehensive (loss) income					745	745
Dividend paid			(16,432)			(16,432)
Tax benefit of equity based awards		6				6
Share-based compensation		846				846
Stock option exercises	1	1,034				1,035
Stock option exercises (in shares)	65,048
Issuance of restricted common stock from treasury shares		(372)		372
Balance at Dec. 31, 2012	184	63,969	48,424	(1,183)	628	112,022
Balance (in shares) at Dec. 31, 2012	18,385,262
Increase (Decrease) in Stockholders' Equity
Net income			32,151			32,151
Other comprehensive (loss) income					(2,413)	(2,413)
Dividend paid			(9,978)			(9,978)
Tax benefit of equity based awards		318				318
Share-based compensation		865				865
Stock option exercises	1	2,140				2,141
Stock option exercises (in shares)	162,314
Issuance of restricted common stock from treasury shares		(864)		864
Issuance of common stock in connection with public offering (net of issuance costs of $5,229)	30	96,402				96,432
Issuance of common stock in connection with public offering (in shares)	2,990,000
Balance at Dec. 31, 2013	215	162,830	70,597	(319)	(1,785)	231,538
Balance (in shares) at Dec. 31, 2013	21,537,576
Increase (Decrease) in Stockholders' Equity
Net income			38,236			38,236
Other comprehensive (loss) income					(5,901)	(5,901)
Dividend paid			(15,532)			(15,532)
Tax benefit of equity based awards		667				667
Share-based compensation		1,250				1,250
Stock option exercises	1	1,264				1,265
Stock option exercises (in shares)	93,621
Repurchase of common stock: 4,860 shares				(186)		(186)
Issuance of restricted common stock	1,246
Issuance of restricted common stock from treasury shares		(487)		487
Balance at Dec. 31, 2014	$ 216	$ 165,524	$ 93,301	$ (18)	$ (7,686)	$ 251,337
Balance (in shares) at Dec. 31, 2014	21,632,443