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Earnings Per Share - Reconciliation (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 30, 2017	Dec. 31, 2016	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Basic earnings per share:
Weighted-average common shares outstanding	29,627,086		29,554,716	29,591,811	29,524,796
Net income	$ 8,077		$ 3,499	$ 17,650	$ 10,666
Basic earnings per share (in dollars per share)	$ 0.27		$ 0.12	$ 0.60	$ 0.36
Diluted earnings per share:
Weighted-average common shares outstanding	29,627,086		29,554,716	29,591,811	29,524,796
Diluted average common shares outstanding	30,103,609		29,838,182	30,019,365	29,828,430
Diluted earnings per share (in dollars per share)	$ 0.27		$ 0.12	$ 0.59	$ 0.36
Warrant term		10 years
Antidilutive options and warrants
Diluted earnings per share:
Dilutive effect of nonvested restricted awards (in shares)	2,556		1,238	2,473	413
One 10 year warrant	900,839		967,339	900,839	977,426
Warrants
Diluted earnings per share:
One 10 year warrant	815,339		815,339
Warrants, exercise price (in dollars per share)	$ 13.43		$ 13.43	$ 13.43	$ 13.43
Warrant term	10 years		10 years
Restricted stock and restricted stock units
Diluted earnings per share:
Dilutive effect of nonvested restricted awards (in shares)	473,967		282,228	425,081	303,221

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