FAIR VALUE OF FINANCIAL INSTRUMENTS (Fair Value By Balance Sheet Location) (Details) (USD $)	Dec. 31, 2013	Dec. 31, 2012
Assets:
Securities—trading	$ 62,472,000	$ 71,232,000
Securities - available-for-sale	470,280,000	472,920,000
Securities - held-to-maturity	103,610,000	92,458,000
Liabilities:
Advances from FHLB at fair value	27,250,000	10,304,000
Carrying Value
Assets:
Cash and due from banks	137,349,000	181,298,000
Securities—trading	62,472,000	71,232,000
Securities - available-for-sale	470,280,000	472,920,000
Securities - held-to-maturity	102,513,000	86,452,000
Loans receivable held for sale	2,734,000	11,920,000
Loans receivable	3,415,711,000	3,223,794,000
FHLB stock	35,390,000	36,705,000
Bank-owned life insurance	61,945,000	59,891,000
Mortgage servicing rights	8,086,000	6,244,000
Derivatives	5,076,000	8,863,000
Liabilities:
Demand, interest-bearing checking, and money market	1,946,467,000	1,800,555,000
Regualr savings	798,764,000	727,956,000
Certificates of deposit	872,695,000	1,029,293,000
Advances from FHLB at fair value	27,250,000	10,304,000
Junior subordinated debentures at fair value	73,928,000	73,063,000
Other borrowings	83,056,000	76,633,000
Derivatives	4,989,000	8,548,000
Carrying Value | Commitments to originate loans [Member]
Liabilities:
Off-balance-sheet financial instruments	(130,000)	(510,000)
Carrying Value | Commitments to sell loans [Member]
Liabilities:
Off-balance-sheet financial instruments	(43,000)	(195,000)
Estimated Fair Value
Assets:
Cash and due from banks	137,349,000	181,298,000
Securities—trading	62,472,000	71,232,000
Securities - available-for-sale	470,280,000	472,920,000
Securities - held-to-maturity	103,610,000	92,458,000
Loans receivable held for sale	2,751,000	12,059,000
Loans receivable	3,297,936,000	3,143,853,000
FHLB stock	35,390,000	36,705,000
Bank-owned life insurance	61,945,000	59,891,000
Mortgage servicing rights	11,529,000	6,244,000
Derivatives	5,076,000	8,863,000
Liabilities:
Demand, interest-bearing checking, and money market	1,697,095,000	1,729,351,000
Regualr savings	695,863,000	694,609,000
Certificates of deposit	867,904,000	1,033,931,000
Advances from FHLB at fair value	27,250,000	10,304,000
Junior subordinated debentures at fair value	73,928,000	73,063,000
Other borrowings	83,056,000	76,633,000
Derivatives	4,989,000	8,548,000
Estimated Fair Value | Commitments to originate loans [Member]
Liabilities:
Off-balance-sheet financial instruments	(130,000)	(510,000)
Estimated Fair Value | Commitments to sell loans [Member]
Liabilities:
Off-balance-sheet financial instruments	$ (43,000)	$ (195,000)