Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Mar. 31, 2016	Dec. 31, 2015	Mar. 31, 2015
Earnings Per Share [Abstract]
Stock options excluded (in shares)	86,044	0	412,748
Net Income
Basic income available to common stockholders	$ 8,554	$ 8,065	$ 1,789
Diluted income available to common stockholders plus assumed conversions	$ 8,554	$ 8,065	$ 1,789
Shares
Basic income available to common stockholders (in shares)	25,555,654	21,510,746	20,091,924
Effect of dilutive stock options and warrants (in shares)	396,530	430,289	290,908
Diluted income available to common stockholders plus assumed conversions (in shares)	25,952,184	21,941,035	20,382,832
Per Share Amount
Basic income available to common stockholders (in dollars per share)	$ 0.33	$ 0.38	$ 0.09
Diluted income available to common stockholders plus assumed conversions (in dollars per share)	$ 0.33	$ 0.37	$ 0.09