INVESTMENT SECURITIES - AMORTIZED COST AND FV (Details)	12 Months Ended
	Dec. 31, 2015 USD ($) item	Dec. 31, 2014 USD ($) item	Dec. 31, 2013 USD ($)	Dec. 31, 2008 USD ($) item
Securities available for Sale - Amortized Cost
Due in one year or less	$ 49,998,000
Due from one year to five years	241,925,000
Due from five years to ten years	10,000,000
Due beyond ten years	3,405,000
Total securities	513,305,000
Securities available for Sale - Fair Value
Due in one year or less	49,979,000
Due from one year to five years	241,525,000
Due from five years to ten years	9,897,000
Due beyond ten years	3,405,000
Total securities	517,058,000
Securities held to maturity - Carrying Value
Due from one year to five years	5,515,000
Total securities	38,727,000	$ 45,437,000
Securities held to maturity - Fair Value
Due from one year to five years	5,514,000
Total securities	$ 39,196,000	$ 45,807,000
Number of Securities Held | item	162	157
Securities available for sale	$ 517,058,000	$ 435,911,000
Total unrealized gain	(3,160,000)	2,021,000	$ (4,747,000)
Private label mortgage backed security
Securities available for Sale - Amortized Cost
Securities not due at a single maturity date	4,037,000
Securities available for Sale - Fair Value
Securities not due at a single maturity date	5,132,000
Securities held to maturity - Fair Value
Securities available for sale	5,132,000	5,250,000
Mortgage backed securities - residential
Securities available for Sale - Amortized Cost
Securities not due at a single maturity date	88,968,000
Securities available for Sale - Fair Value
Securities not due at a single maturity date	92,268,000
Securities held to maturity - Carrying Value
Securities not due at a single maturity date	53,000
Total securities	53,000	147,000
Securities held to maturity - Fair Value
Securities not due at a single maturity date	59,000
Total securities	59,000	167,000
Securities available for sale	92,268,000	124,256,000
Collateralized mortgage obligations
Securities available for Sale - Amortized Cost
Securities not due at a single maturity date	113,972,000
Securities available for Sale - Fair Value
Securities not due at a single maturity date	113,668,000
Securities held to maturity - Carrying Value
Securities not due at a single maturity date	33,159,000
Total securities	33,159,000	38,543,000
Securities held to maturity - Fair Value
Securities not due at a single maturity date	33,623,000
Total securities	33,623,000	38,962,000
Securities available for sale	113,668,000	143,171,000
Freddie Mac preferred stock
Securities available for Sale - Fair Value
Securities not due at a single maturity date	173,000
Securities held to maturity - Fair Value
Other than Temporary Impairment Losses, Investments, Portion Recognized in Earnings, Net				$ 2,100,000
Number of Securities Held | item				40,000
Securities available for sale	173,000	231,000		$ 0
Total unrealized gain		173,000
Mutual fund
Securities available for Sale - Amortized Cost
Securities not due at a single maturity date	1,000,000
Securities available for Sale - Fair Value
Securities not due at a single maturity date	1,011,000
Securities held to maturity - Fair Value
Securities available for sale	1,011,000	$ 1,018,000
Republic Bancorp, Inc.
Securities held to maturity - Fair Value
Securities available for sale	$ 3,405,000