Earnings Per Share (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Basic Net Income per Common Share Available to Common Stockholders [Abstract]
Net income	$ 6,264,000	$ 4,806,000
Preferred stock dividends	0	(550,000)
Net income available to common stockholders	$ 6,264,000	$ 4,256,000
Weighted average common shares outstanding	12,475,728	8,455,507
Basic earnings per common share	$ 0.50	$ 0.50
Diluted Net Income per Common Share Available to Common Stockholders [Abstract]
Net income available to common stockholders	$ 6,264,000	$ 4,256,000
Effect of assumed preferred stock conversion	0	550,000
Net income applicable to diluted earnings per share	$ 6,264,000	$ 4,806,000
Weighted average common shares outstanding	12,475,728	8,455,507
Dilutive potential common shares [Abstract]
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements	9,179	178
Restricted stock awarded	836	5,232
Assumed conversion of preferred stock	0	1,355,348
Dilutive potential common shares	10,015	1,360,758
Diluted weighted average common shares outstanding	12,485,743	9,816,265
Diluted net income per common share available to common stockholders	$ 0.50	$ 0.49
Stock options to purchase shares of common stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share (in shares)	0	24,500