SEGMENT REPORTING (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Segment Reporting Information [Line Items]
Interest income	$ 67,050	$ 54,559
Interest expense	6,460	4,123
Net interest income	60,590	50,436
Provision for loan losses	1,836	681	$ 4,091
Noninterest income	25,706	24,286
Noninterest expense
Salaries and employee benefits	27,794	26,187
Equipment and occupancy expenses	5,877	5,700
Data processing and telecommunications expenses	6,572	6,113
Other expenses	12,850	17,600
Total noninterest expense	53,093	55,600
Income before income tax expense	31,367	18,441
Income tax expense	10,214	6,124
Net income	21,153	12,317
Total assets	7,094,856	6,097,771	6,892,031
Goodwill	125,532	121,512	125,532
Other intangible assets, net	16,391	21,892	$ 17,428
Banking Division [Member]
Segment Reporting Information [Line Items]
Interest income	54,212	49,779
Interest expense	4,086	3,296
Net interest income	50,126	46,483
Provision for loan losses	1,982	681
Noninterest income	13,013	12,735
Noninterest expense
Salaries and employee benefits	18,844	18,989
Equipment and occupancy expenses	5,257	5,150
Data processing and telecommunications expenses	6,043	5,820
Other expenses	9,241	16,436
Total noninterest expense	39,385	46,395
Income before income tax expense	21,772	12,142
Income tax expense	6,856	3,919
Net income	14,916	8,223
Total assets	6,100,876	5,634,850
Goodwill	125,532	121,512
Other intangible assets, net	16,391	21,892
Retail Mortgage Division [Member]
Segment Reporting Information [Line Items]
Interest income	4,054	3,020
Interest expense	1,078	590
Net interest income	2,976	2,430
Provision for loan losses	8	0
Noninterest income	10,513	9,624
Noninterest expense
Salaries and employee benefits	7,216	6,347
Equipment and occupancy expenses	519	488
Data processing and telecommunications expenses	317	272
Other expenses	1,141	956
Total noninterest expense	9,193	8,063
Income before income tax expense	4,288	3,991
Income tax expense	1,501	1,397
Net income	2,787	2,594
Total assets	378,897	260,038
Goodwill	0	0
Other intangible assets, net	0	0
Warehouse Lending Division [Member]
Segment Reporting Information [Line Items]
Interest income	1,333	1,019
Interest expense	228	92
Net interest income	1,105	927
Provision for loan losses	(232)	0
Noninterest income	319	333
Noninterest expense
Salaries and employee benefits	147	188
Equipment and occupancy expenses	1	1
Data processing and telecommunications expenses	27	20
Other expenses	32	25
Total noninterest expense	207	234
Income before income tax expense	1,449	1,026
Income tax expense	507	359
Net income	942	667
Total assets	107,937	137,461
Goodwill	0	0
Other intangible assets, net	0	0
SBA Division [Member]
Segment Reporting Information [Line Items]
Interest income	1,213	741
Interest expense	306	145
Net interest income	907	596
Provision for loan losses	48	0
Noninterest income	1,815	1,594
Noninterest expense
Salaries and employee benefits	591	663
Equipment and occupancy expenses	51	61
Data processing and telecommunications expenses	1	1
Other expenses	211	183
Total noninterest expense	854	908
Income before income tax expense	1,820	1,282
Income tax expense	637	449
Net income	1,183	833
Total assets	76,405	65,422
Goodwill	0	0
Other intangible assets, net	0	0
Premium Finance Division [Member]
Segment Reporting Information [Line Items]
Interest income	6,238	0
Interest expense	762	0
Net interest income	5,476	0
Provision for loan losses	30	0
Noninterest income	46	0
Noninterest expense
Salaries and employee benefits	996	0
Equipment and occupancy expenses	49	0
Data processing and telecommunications expenses	184	0
Other expenses	2,225	0
Total noninterest expense	3,454	0
Income before income tax expense	2,038	0
Income tax expense	713	0
Net income	1,325	0
Total assets	430,741	0
Goodwill	0	0
Other intangible assets, net	$ 0	$ 0