SEGMENT REPORTING (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Segment Reporting Information [Line Items]
Interest income	$ 59,340	$ 44,229	$ 113,899	$ 86,597
Interest expense	4,751	3,541	8,874	7,077
Net interest income	54,589	40,688	105,025	79,520
Provision for loan losses	889	2,656	1,570	3,725	$ 5,264
Noninterest income	28,379	20,626	52,665	38,201
Noninterest expense
Salaries and employee benefits	27,531	22,465	53,718	43,097
Equipment and occupancy expenses	6,371	4,809	12,071	9,363
Data processing and telecommunications expenses	6,049	4,214	12,162	8,474
Other expenses	12,408	25,376	30,008	36,757
Total noninterest expense	52,359	56,864	107,959	97,691
Income before income tax expense	29,720	1,794	48,161	16,305
Income tax expense	9,671	486	15,795	5,233
Net income	20,049	1,308	32,366	11,072
Total assets	6,221,294	5,205,734	6,221,294	5,205,734	5,588,940
Other intangible assets, net	20,574	19,189	20,574	19,189	17,058
Goodwill	121,422	87,367	121,422	87,367	$ 90,082
Banking Division [Member]
Segment Reporting Information [Line Items]
Interest income	53,534	40,252	103,313	79,549
Interest expense	4,594	3,446	8,572	6,904
Net interest income	48,940	36,806	94,741	72,645
Provision for loan losses	733	2,456	1,414	3,383
Noninterest income	13,018	9,262	25,753	18,042
Noninterest expense
Salaries and employee benefits	18,428	15,675	37,417	31,037
Equipment and occupancy expenses	5,901	4,376	11,051	8,520
Data processing and telecommunications expenses	5,685	3,913	11,505	7,924
Other expenses	11,071	24,048	27,507	34,404
Total noninterest expense	41,085	48,012	87,480	81,885
Income before income tax expense	20,140	(4,400)	31,600	5,419
Income tax expense	6,318	(1,682)	9,999	1,423
Net income	13,822	(2,718)	21,601	3,996
Total assets	5,691,976	4,823,335	5,691,976	4,823,335
Other intangible assets, net	20,574	19,189	20,574	19,189
Goodwill	121,422	87,367	121,422	87,367
Retail Mortgage Division [Member]
Segment Reporting Information [Line Items]
Interest income	3,293	1,979	6,313	3,524
Interest expense	0	0	0	0
Net interest income	3,293	1,979	6,313	3,524
Provision for loan losses	93	200	93	342
Noninterest income	13,304	9,095	22,928	16,705
Noninterest expense
Salaries and employee benefits	8,304	5,592	14,651	10,119
Equipment and occupancy expenses	405	396	893	776
Data processing and telecommunications expenses	338	279	610	491
Other expenses	1,133	1,150	2,089	2,082
Total noninterest expense	10,180	7,417	18,243	13,468
Income before income tax expense	6,324	3,457	10,905	6,419
Income tax expense	2,213	1,210	3,816	2,246
Net income	4,111	2,247	7,089	4,173
Total assets	306,932	235,067	306,932	235,067
Other intangible assets, net	0	0	0	0
Goodwill	0	0	0	0
Warehouse Lending Division [Member]
Segment Reporting Information [Line Items]
Interest income	1,622	1,179	2,641	2,014
Interest expense	0	0	0	0
Net interest income	1,622	1,179	2,641	2,014
Provision for loan losses	0	0	0	0
Noninterest income	440	383	773	656
Noninterest expense
Salaries and employee benefits	108	99	296	226
Equipment and occupancy expenses	1	1	2	3
Data processing and telecommunications expenses	25	20	45	53
Other expenses	26	19	51	55
Total noninterest expense	160	139	394	337
Income before income tax expense	1,902	1,423	3,020	2,333
Income tax expense	666	498	1,057	817
Net income	1,236	925	1,963	1,516
Total assets	150,823	82,913	150,823	82,913
Other intangible assets, net	0	0	0	0
Goodwill	0	0	0	0
SBA Division [Member]
Segment Reporting Information [Line Items]
Interest income	891	819	1,632	1,510
Interest expense	157	95	302	173
Net interest income	734	724	1,330	1,337
Provision for loan losses	63	0	63	0
Noninterest income	1,617	1,886	3,211	2,798
Noninterest expense
Salaries and employee benefits	691	1,099	1,354	1,715
Equipment and occupancy expenses	64	36	125	64
Data processing and telecommunications expenses	1	2	2	6
Other expenses	178	159	361	216
Total noninterest expense	934	1,296	1,842	2,001
Income before income tax expense	1,354	1,314	2,636	2,134
Income tax expense	474	460	923	747
Net income	880	854	1,713	1,387
Total assets	71,563	64,419	71,563	64,419
Other intangible assets, net	0	0	0	0
Goodwill	$ 0	$ 0	$ 0	$ 0