Consolidated Statements of Operations (Unaudited) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Interest and dividend income:
Interest and fees on loans	$ 129,317	$ 131,253	$ 134,476
Interest and dividends on investment securities	29,665	38,145	48,651
Dividends on non-marketable securities	748	1,210	1,206
Interest on interest-bearing bank deposits	718	799	329
Total interest and dividend income	160,448	171,407	184,662
Interest expense:
Interest on deposits	13,963	13,609	14,120
Interest on borrowings	845	853	293
Total interest expense	14,808	14,462	14,413
Net interest income before provision for loan losses	145,640	156,945	170,249
Provision for loan losses	23,651	12,444	6,209
Net interest income after provision for loan losses	121,989	144,501	164,040
Non-interest income:
Service charges	13,900	14,798	15,430
Bank card fees	11,429	10,898	10,123
Gain on sale of mortgages, net	2,881	1,963	1,000
Bank-owned life insurance income	1,861	1,614	442
Other non-interest income	7,708	4,301	4,105
OREO related write-ups and other income	2,248	2,379	3,807
Bargain purchase gain		1,048
FDIC loss-sharing related	0	(15,553)	(36,603)
Total non-interest income	40,027	21,448	(1,696)
Non-interest expense:
Salaries and benefits	79,765	83,018	82,834
Occupancy and equipment	22,904	24,490	25,101
Telecommunications and data processing	5,970	11,507	11,927
Marketing and business development	2,564	4,325	4,571
FDIC deposit insurance	3,236	3,922	4,130
Bank card expenses	4,440	3,701	3,079
Professional fees	3,496	4,495	3,257
Other non-interest expense	8,554	11,107	14,581
Problem asset workout	3,983	7,317	11,258
Gain on OREO sales, net	(4,383)	(2,776)	(13,126)
Intangible asset amortization	5,480	5,401	5,344
Loss (gain) from the change in fair value of warrant liability		106	(2,953)
Banking center consolidation related expenses		1,411
Total non-interest expense	136,009	158,024	150,003
Income before income taxes	26,007	7,925	12,341
Income tax expense	2,947	3,044	3,165
Net income	$ 23,060	$ 4,881	$ 9,176
Income per share-basic (in dollars per share)	$ 0.81	$ 0.14	$ 0.22
Income per share-diluted (in dollars per share)	$ 0.79	$ 0.14	$ 0.22
Weighted average number of common shares outstanding:
Basic (Shares)	28,313,061	34,349,996	42,404,609
Diluted (Shares)	29,091,343	34,363,487	42,421,014