Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2016	Jun. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Earnings Per Share [Abstract]
Stock options excluded (in shares)	5,000	154,251	58,136	136,951	289,374
Net Income
Basic income available to common stockholders	$ 9,227	$ 10,369	$ 7,837	$ 28,152	$ 17,450
Diluted income available to common stockholders plus assumed conversions	$ 9,227	$ 10,369	$ 7,837	$ 28,152	$ 17,450
Shares
Basic income available to common stockholders (in shares)	27,387,123	27,378,930	21,510,678	26,776,140	21,037,345
Effect of dilutive stock options and warrants (in shares)	538,228	466,560	356,162	468,968	304,859
Diluted income available to common stockholders plus assumed conversions (in shares)	27,925,351	27,845,490	21,866,840	27,245,108	21,342,204
Per Share Amount
Basic income available to common stockholders (in dollars per share)	$ 0.34	$ 0.38	$ 0.36	$ 1.05	$ 0.83
Diluted income available to common stockholders plus assumed conversions (in dollars per share)	$ 0.33	$ 0.37	$ 0.36	$ 1.03	$ 0.82