SECURITIES (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Available for sale:
Amortized Cost	$ 679,960	$ 775,903
Gross Unrealized Gains	56	306
Gross Unrealized Losses	(20,940)	(16,293)
Estimated Fair Value	659,076	759,916
U.S. GSE securities
Available for sale:
Amortized Cost	29,996	57,994
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(1,258)	(1,180)
Estimated Fair Value	28,738	56,814
State and municipal obligations
Available for sale:
Amortized Cost	38,423	87,582
Gross Unrealized Gains	50	259
Gross Unrealized Losses	(525)	(819)
Estimated Fair Value	37,948	87,022
U.S. GSE residential mortgage-backed securities
Available for sale:
Amortized Cost	101,884	189,705
Gross Unrealized Gains	0	29
Gross Unrealized Losses	(3,688)	(2,833)
Estimated Fair Value	98,196	186,901
U.S. GSE residential collateralized mortgage obligations
Available for sale:
Amortized Cost	340,978	314,390
Gross Unrealized Gains	6	16
Gross Unrealized Losses	(8,937)	(7,016)
Estimated Fair Value	332,047	307,390
U.S. GSE commercial mortgage-backed securities
Available for sale:
Amortized Cost	3,584	6,017
Gross Unrealized Gains	0	2
Gross Unrealized Losses	(67)	(40)
Estimated Fair Value	3,517	5,979
U.S. GSE commercial collateralized mortgage obligations
Available for sale:
Amortized Cost	94,845	49,965
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(2,438)	(1,249)
Estimated Fair Value	92,407	48,716
Other asset backed securities
Available for sale:
Amortized Cost	24,250	24,250
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(727)	(849)
Estimated Fair Value	23,523	23,401
Corporate bonds
Available for sale:
Amortized Cost	46,000	46,000
Gross Unrealized Gains	0	0
Gross Unrealized Losses	(3,300)	(2,307)
Estimated Fair Value	$ 42,700	$ 43,693

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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