SEGMENT INFORMATION (Details) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) segment	Sep. 30, 2014 USD ($)	Dec. 31, 2014 USD ($)
Segment Reporting, Disclosure of Entity's Reportable Segments [Abstract]
Number of operating segments | segment			4
Segment Reporting Information, Profit (Loss) [Abstract]
Net interest income	$ 31,424	$ 28,442	$ 91,504	$ 83,296
Provision for loan and lease losses	2,233	1,510	3,322	1,500
Net Refund Transfer Fees	97	(133)	17,339	16,091
Mortgage banking income	972	876	3,549	2,174
Gain on call of security available for sale			88
Other non interest income	6,737	5,784	19,301	18,058
Total non-interest income	7,806	6,527	40,277	36,323
Total non interest expenses	28,238	25,205	86,477	81,688
Income before income tax expense	8,759	8,254	41,982	36,431
Income tax expense	3,119	3,008	14,234	12,879
NET INCOME	5,640	5,246	27,748	23,552
Segment end of period total assets	$ 4,035,977	$ 3,625,619	$ 4,035,977	$ 3,625,619	$ 3,747,013
Net interest margin (as percent)	3.31%	3.38%	3.26%	3.32%
Traditional Banking
Segment Reporting Information, Profit (Loss) [Abstract]
Net interest income	$ 27,612	$ 26,103	$ 80,369	$ 77,809
Provision for loan and lease losses	1,338	1,471	2,007	1,780
Gain on call of security available for sale			88
Other non interest income	6,115	5,452	17,286	16,451
Total non-interest income	6,115	5,452	17,374	16,451
Total non interest expenses	24,109	21,899	71,351	68,431
Income before income tax expense	8,280	8,185	24,385	24,049
Income tax expense	2,879	3,005	7,813	8,346
NET INCOME	5,401	5,180	16,572	15,703
Segment end of period total assets	$ 3,600,230	$ 3,325,922	$ 3,600,230	$ 3,325,922
Net interest margin (as percent)	3.23%	3.35%	3.19%	3.32%
Warehouse Lending
Segment Reporting Information, Profit (Loss) [Abstract]
Net interest income	$ 3,308	$ 2,234	$ 9,354	$ 5,082
Provision for loan and lease losses	(238)	71	185	232
Other non interest income	8	4	19	9
Total non-interest income	8	4	19	9
Total non interest expenses	663	466	1,846	1,294
Income before income tax expense	2,891	1,701	7,342	3,565
Income tax expense	1,174	595	2,732	1,248
NET INCOME	1,717	1,106	4,610	2,317
Segment end of period total assets	$ 393,110	$ 272,264	$ 393,110	$ 272,264
Net interest margin (as percent)	3.62%	3.68%	3.58%	3.80%
Mortgage Banking
Segment Reporting Information, Profit (Loss) [Abstract]
Net interest income	$ 67	$ 38	$ 180	$ 133
Mortgage banking income	972	876	3,549	2,174
Other non interest income	76	41	231	186
Total non-interest income	1,048	917	3,780	2,360
Total non interest expenses	1,151	754	3,710	2,977
Income before income tax expense	(36)	201	250	(484)
Income tax expense	(13)	71	87	(169)
NET INCOME	(23)	130	163	(315)
Segment end of period total assets	13,832	11,150	13,832	11,150
Total Core Banking
Segment Reporting Information, Profit (Loss) [Abstract]
Net interest income	30,987	28,375	89,903	83,024
Provision for loan and lease losses	1,100	1,542	2,192	2,012
Mortgage banking income	972	876	3,549	2,174
Gain on call of security available for sale			88
Other non interest income	6,199	5,497	17,536	16,646
Total non-interest income	7,171	6,373	21,173	18,820
Total non interest expenses	25,923	23,119	76,907	72,702
Income before income tax expense	11,135	10,087	31,977	27,130
Income tax expense	4,040	3,671	10,632	9,425
NET INCOME	7,095	6,416	21,345	17,705
Segment end of period total assets	$ 4,007,172	$ 3,609,336	$ 4,007,172	$ 3,609,336
Net interest margin (as percent)	3.27%	3.38%	3.23%	3.34%
Republic Processing Group
Segment Reporting Information, Profit (Loss) [Abstract]
Net interest income	$ 437	$ 67	$ 1,601	$ 272
Provision for loan and lease losses	1,133	(32)	1,130	(512)
Net Refund Transfer Fees	97	(133)	17,339	16,091
Other non interest income	538	287	1,765	1,412
Total non-interest income	635	154	19,104	17,503
Total non interest expenses	2,315	2,086	9,570	8,986
Income before income tax expense	(2,376)	(1,833)	10,005	9,301
Income tax expense	(921)	(663)	3,602	3,454
NET INCOME	(1,455)	(1,170)	6,403	5,847
Segment end of period total assets	$ 28,805	$ 16,283	$ 28,805	$ 16,283