Income Per Share - (Schedule of Computation of Basic and Diluted Income Per Share) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Net income	$ 9,209	$ 4,504	$ 17,467	$ 4,755
Undistributed Earnings (Loss) Allocated to Participating Securities, Basic	(14)	(12)	(30)	(25)
Income available to common stockholders (numerator)	$ 9,195	$ 4,492	$ 17,437	$ 4,730
Weighted average common shares outstanding (denominator)	26,955,187	29,215,822	26,878,904	29,666,570
Weighted average shares outstanding for diluted earnings per common share	27,597,443	29,278,759	27,637,532	29,707,379
Income per share-basic (in dollars per share)	$ 0.34	$ 0.15	$ 0.65	$ 0.16
Income per share-diluted (in dollars per share)	$ 0.33	$ 0.15	$ 0.63	$ 0.16
Equity Option [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dilutive Convertible Securities	642,256	49,461	742,001	37,643
Warrant [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Dilutive Convertible Securities		13,476	16,627	3,166