REVENUE FROM CONTRACTS WITH CUSTOMERS (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2019	Mar. 31, 2018
Revenue recognition
Practical expedient allows incremental costs of obtaining contract when amortization period less than one year	true
Net interest income	$ 72,299	$ 67,665
Noninterest income:
Service charges on deposit accounts	3,303	3,555
Net refund transfer fees	17,100	16,352
Mortgage banking income	1,539	1,020
Interchange fee income	2,757	2,667
Program fees	1,074	1,696
Increase in cash surrender value of bank owned life insurance	382	371
Net gains (losses) on OREO	130	132
Other	1,132	1,752
Noninterest income	27,417	27,545
Total net revenue	$ 99,716	$ 95,210
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	44,344	$ 41,851
Noninterest income:
Service charges on deposit accounts	3,303	3,555
Mortgage banking income	1,539	1,020
Interchange fee income	2,626	2,538
Increase in cash surrender value of bank owned life insurance	382	371
Net gains (losses) on OREO	130	132
Other	505	452
Noninterest income	8,485	8,068
Total net revenue	$ 52,829	$ 49,919
Net-revenue concentration (as percent)	53.00%	52.00%
Traditional Banking
Revenue recognition
Net interest income	$ 41,347	$ 38,188
Noninterest income:
Service charges on deposit accounts	3,293	3,547
Interchange fee income	2,626	2,538
Increase in cash surrender value of bank owned life insurance	382	371
Net gains (losses) on OREO	130	132
Other	465	414
Noninterest income	6,896	7,002
Total net revenue	$ 48,243	$ 45,190
Net-revenue concentration (as percent)	48.00%	47.00%
Warehouse Lending
Revenue recognition
Net interest income	$ 2,895	$ 3,591
Noninterest income:
Service charges on deposit accounts	10	8
Noninterest income	10	8
Total net revenue	$ 2,905	$ 3,599
Net-revenue concentration (as percent)	3.00%	4.00%
Mortgage Banking
Revenue recognition
Net interest income	$ 102	$ 72
Noninterest income:
Mortgage banking income	1,539	1,020
Other	40	38
Noninterest income	1,579	1,058
Total net revenue	$ 1,681	$ 1,130
Net-revenue concentration (as percent)	2.00%	1.00%
Republic Processing Group
Revenue recognition
Net interest income	$ 27,955	$ 25,814
Noninterest income:
Net refund transfer fees	17,100	16,352
Interchange fee income	131	129
Program fees	1,074	1,696
Other	627	1,300
Noninterest income	18,932	19,477
Total net revenue	$ 46,887	$ 45,291
Net-revenue concentration (as percent)	47.00%	48.00%
Tax Refund Solutions
Revenue recognition
Net interest income	$ 20,438	$ 18,686
Noninterest income:
Net refund transfer fees	17,100	16,352
Interchange fee income	131	109
Program fees	146	59
Other		1,001
Noninterest income	17,377	17,521
Total net revenue	$ 37,815	$ 36,207
Net-revenue concentration (as percent)	38.00%	38.00%
Republic Credit Solutions
Revenue recognition
Net interest income	$ 7,517	$ 7,128
Noninterest income:
Interchange fee income		20
Program fees	928	1,637
Other	627	299
Noninterest income	1,555	1,956
Total net revenue	$ 9,072	$ 9,084
Net-revenue concentration (as percent)	9.00%	10.00%

The amount of capital commitment fee.

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

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Noninterest income from interchange fees.

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

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Income from mortgage banking.

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Represents fees earned on refund transfers or ("RTs"). RTs are products whereby a tax refund is issued to the taxpayer after the Bank has received the refund from the federal or state government. These fees are reported as non interest income.

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Represents net revenue concentration as a percent.

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Noninterest income from service charges on deposit accounts.

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

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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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The net gain (loss) resulting from sales and other disposals of other real estate owned, increases (decreases) in the valuation allowance for foreclosed real estate, and write-downs of other real estate owned after acquisition or physical possession.

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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.

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Amount of revenue earned, classified as other, excluding interest income.

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Indicates (true false) whether practical expedient was 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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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).

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