REVENUE FROM CONTRACTS WITH CUSTOMERS (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Revenue recognition
Revenue, Practical Expedient, Incremental Cost of Obtaining Contract [true/false]	true
Net interest income	$ 67,665	$ 56,438
Noninterest income:
Mortgage Banking Income	1,020	1,160
Program fees	1,696	1,091
Increase in cash surrender value of bank owned life insurance	371	391
Noninterest income	27,545	24,923
Total net revenue	$ 95,210	$ 81,361
Net-revenue concentration (as percent)	100.00%	100.00%
Writedowns during entity's holding of property (as a percent)	10.00%
Nonrefundable capital commitment fee	$ 1,000
Core Banking Activities
Revenue recognition
Net interest income	41,851	$ 36,628
Noninterest income:
Mortgage Banking Income	1,020	1,160
Increase in cash surrender value of bank owned life insurance	371	391
Noninterest income	8,068	7,697
Total net revenue	$ 49,919	$ 44,325
Net-revenue concentration (as percent)	52.00%	55.00%
Traditional Banking
Revenue recognition
Net interest income	$ 38,188	$ 32,661
Noninterest income:
Increase in cash surrender value of bank owned life insurance	371	391
Noninterest income	7,002	6,519
Total net revenue	$ 45,190	$ 39,180
Net-revenue concentration (as percent)	47.00%	48.00%
Warehouse Lending
Revenue recognition
Net interest income	$ 3,591	$ 3,900
Noninterest income:
Noninterest income	8	6
Total net revenue	$ 3,599	$ 3,906
Net-revenue concentration (as percent)	4.00%	5.00%
Mortgage Banking
Revenue recognition
Net interest income	$ 72	$ 67
Noninterest income:
Mortgage Banking Income	1,020	1,160
Noninterest income	1,058	1,172
Total net revenue	$ 1,130	$ 1,239
Net-revenue concentration (as percent)	1.00%	2.00%
Republic Processing Group
Revenue recognition
Net interest income	$ 25,814	$ 19,810
Noninterest income:
Program fees	1,696	1,091
Noninterest income	19,477	17,226
Total net revenue	$ 45,291	$ 37,036
Net-revenue concentration (as percent)	48.00%	45.00%
Tax Refund Solutions
Revenue recognition
Net interest income	$ 18,686	$ 14,962
Noninterest income:
Program fees	59	(17)
Noninterest income	17,521	15,433
Total net revenue	$ 36,207	$ 30,395
Net-revenue concentration (as percent)	38.00%	37.00%
Republic Credit Solutions
Revenue recognition
Net interest income	$ 7,128	$ 4,848
Noninterest income:
Program fees	1,637	1,108
Noninterest income	1,956	1,793
Total net revenue	$ 9,084	$ 6,641
Net-revenue concentration (as percent)	10.00%	8.00%
Service charges on deposit accounts
Revenue recognition
Revenue from contract with customer	$ 3,555	$ 3,247
Service charges on deposit accounts \| Core Banking Activities
Revenue recognition
Revenue from contract with customer	3,555	3,286
Service charges on deposit accounts \| Traditional Banking
Revenue recognition
Revenue from contract with customer	3,547	3,280
Service charges on deposit accounts \| Warehouse Lending
Revenue recognition
Revenue from contract with customer	8	6
Service charges on deposit accounts \| Republic Processing Group
Revenue recognition
Revenue from contract with customer		(39)
Service charges on deposit accounts \| Tax Refund Solutions
Revenue recognition
Revenue from contract with customer		(39)
Net refund transfer fees
Revenue recognition
Revenue from contract with customer	16,352	15,382
Net refund transfer fees \| Republic Processing Group
Revenue recognition
Revenue from contract with customer	16,352	15,382
Net refund transfer fees \| Tax Refund Solutions
Revenue recognition
Revenue from contract with customer	16,352	15,382
Interchange fee
Revenue recognition
Revenue from contract with customer	2,667	2,326
Interchange fee \| Core Banking Activities
Revenue recognition
Revenue from contract with customer	2,538	2,217
Interchange fee \| Traditional Banking
Revenue recognition
Revenue from contract with customer	2,538	2,217
Interchange fee \| Republic Processing Group
Revenue recognition
Revenue from contract with customer	129	109
Interchange fee \| Tax Refund Solutions
Revenue recognition
Revenue from contract with customer	109	97
Interchange fee \| Republic Credit Solutions
Revenue recognition
Revenue from contract with customer	20	12
Other Real Estate Owned
Revenue recognition
Revenue from contract with customer		142
Other Real Estate Owned \| Core Banking Activities
Revenue recognition
Revenue from contract with customer		142
Other Real Estate Owned \| Traditional Banking
Revenue recognition
Revenue from contract with customer		142
Net gains (losses) on OREO
Revenue recognition
Revenue from contract with customer	132
Net gains (losses) on OREO \| Core Banking Activities
Revenue recognition
Revenue from contract with customer	132
Net gains (losses) on OREO \| Traditional Banking
Revenue recognition
Revenue from contract with customer	132
Other
Revenue recognition
Revenue from contract with customer	1,752	1,184
Other \| Core Banking Activities
Revenue recognition
Revenue from contract with customer	452	501
Other \| Traditional Banking
Revenue recognition
Revenue from contract with customer	414	489
Other \| Mortgage Banking
Revenue recognition
Revenue from contract with customer	38	12
Other \| Republic Processing Group
Revenue recognition
Revenue from contract with customer	1,300	683
Other \| Tax Refund Solutions
Revenue recognition
Revenue from contract with customer	1,001	10
Other \| Republic Credit Solutions
Revenue recognition
Revenue from contract with customer	$ 299	$ 673

The amount of capital commitment fee.

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- Definition

Income from mortgage banking activities Processing Group program fees and commissions.

+ References

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The minimum percentage of write-down of other real estate owned.

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- Definition

Income from mortgage banking.

+ References

No definition available.

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- Definition

Represents net revenue concentration as a percent.

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- Definition

Earnings on or other increases in the value of the cash surrender value of bank owned life insurance policies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04.13)
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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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- Definition

The net amount of operating interest income (expense).

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The total amount of noninterest income which may be derived from: (1) fees and commissions; (2) premiums earned; (3) insurance policy charges; (4) the sale or disposal of assets; and (5) other sources not otherwise specified.

+ References

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- Definition

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

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- Definition

Indicates (true/false) whether practical expedient is elected to recognize incremental cost of obtaining contract as expense when incurred if amortization period would have been one year or less.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

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