Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			6 Months Ended
	Jun. 30, 2017	Mar. 31, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Earnings Per Share [Abstract]
Stock options excluded (in shares)	15,531	0	154,251	7,389	131,703
Net Income
Basic income available to common stockholders	$ 14,176	$ 9,521	$ 10,369	$ 23,697	$ 18,923
Diluted income available to common stockholders plus assumed conversions	$ 14,176	$ 9,521	$ 10,369	$ 23,697	$ 18,923
Shares
Basic income available to common stockholders (in shares)	39,586,524	27,528,940	27,378,930	33,591,040	26,467,292
Effect of dilutive stock options and warrants (in shares)	680,696	668,280	466,560	676,175	434,335
Diluted income available to common stockholders plus assumed conversions (in shares)	40,267,220	28,197,220	27,845,490	34,267,215	26,901,627
Per Share Amount
Basic income available to common stockholders (in dollars per share)	$ 0.36	$ 0.35	$ 0.38	$ 0.71	$ 0.72
Diluted income available to common stockholders plus assumed conversions (in dollars per share)	$ 0.35	$ 0.34	$ 0.37	$ 0.69	$ 0.70