CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Preferred Stock	Common Stock	Retained Earnings	Accumulated Other Comprehensive Income / (Loss)	Total
Balance at Dec. 31, 2015	$ 19,519	$ 193,364	$ 38,773	$ (6,220)	$ 245,436
Balance (in shares) at Dec. 31, 2015	21,004	32,113,479
Increase (Decrease) in Shareholders' Equity
Net income			20,166		20,166
Other comprehensive income				4,212	4,212
Preferred stock exchanged for common stock	$ (19,519)
Preferred stock exchanged for common stock (in shares)	(21,004)
Preferred stock exchanged for common stock		$ 19,519
Preferred stock exchanged for common stock (in shares)		5,601,000
Issuance of restricted stock awards, net (in shares)		82,372
Amortization of restricted stock awards, net of forfeitures and taxes		$ 291			291
Cash dividend declared			(10,213)		(10,213)
Stock option expense, net of forfeitures and taxes		712			712
Stock options exercised		$ 715			715
Stock options exercised (in shares)		118,885
Balance at Sep. 30, 2016		$ 214,601	48,726	(2,008)	261,319
Balance (in shares) at Sep. 30, 2016		37,915,736
Balance at Dec. 31, 2016		$ 215,237	52,527	(7,914)	259,850
Balance (in shares) at Dec. 31, 2016		37,941,007
Increase (Decrease) in Shareholders' Equity
Net income			22,570		22,570
Other comprehensive income				1,774	1,774
Issuance of restricted stock awards, net (in shares)		64,136
Amortization of restricted stock awards, net of forfeitures and taxes		$ 678			678
Cash dividend declared			(11,418)		(11,418)
Stock option expense, net of forfeitures and taxes		639			639
Stock options exercised		$ 1,352			1,352
Stock options exercised (in shares)		193,863
Balance at Sep. 30, 2017		$ 217,906	$ 63,679	$ (6,140)	$ 275,445
Balance (in shares) at Sep. 30, 2017		38,199,006