SECURITIES - Available for Sale Securities in a Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Available for sale:
Less than 12 months, Estimated Fair Value	$ 35,723	$ 99,812
Less than 12 months, Gross Unrealized Losses	(132)	(779)
Greater than 12 months, Estimated Fair Value	330,019	424,638
Greater than 12 months, Gross Unrealized Losses	(6,425)	(16,685)
U.S. GSE securities
Available for sale:
Less than 12 months, Estimated Fair Value	0	0
Less than 12 months, Gross Unrealized Losses	0	0
Greater than 12 months, Estimated Fair Value	14,963	29,050
Greater than 12 months, Gross Unrealized Losses	(37)	(947)
State and municipal obligations
Available for sale:
Less than 12 months, Estimated Fair Value	0	6,655
Less than 12 months, Gross Unrealized Losses	0	(15)
Greater than 12 months, Estimated Fair Value	2,964	21,273
Greater than 12 months, Gross Unrealized Losses	(1)	(339)
U.S. GSE residential mortgage-backed securities
Available for sale:
Less than 12 months, Estimated Fair Value	0	0
Less than 12 months, Gross Unrealized Losses	0	0
Greater than 12 months, Estimated Fair Value	67,117	88,762
Greater than 12 months, Gross Unrealized Losses	(909)	(3,036)
U.S. GSE residential collateralized mortgage obligations
Available for sale:
Less than 12 months, Estimated Fair Value	35,723	46,452
Less than 12 months, Gross Unrealized Losses	(132)	(141)
Greater than 12 months, Estimated Fair Value	134,232	172,468
Greater than 12 months, Gross Unrealized Losses	(1,296)	(5,813)
U.S. GSE commercial mortgage-backed securities
Available for sale:
Less than 12 months, Estimated Fair Value		0
Less than 12 months, Gross Unrealized Losses		0
Greater than 12 months, Estimated Fair Value		3,508
Greater than 12 months, Gross Unrealized Losses		(28)
U.S. GSE commercial collateralized mortgage obligations
Available for sale:
Less than 12 months, Estimated Fair Value		46,705
Less than 12 months, Gross Unrealized Losses		(623)
Greater than 12 months, Estimated Fair Value	44,046	43,933
Greater than 12 months, Gross Unrealized Losses	(629)	(1,916)
Other asset backed securities
Available for sale:
Less than 12 months, Estimated Fair Value	0	0
Less than 12 months, Gross Unrealized Losses	0	0
Greater than 12 months, Estimated Fair Value	23,462	23,219
Greater than 12 months, Gross Unrealized Losses	(788)	(1,031)
Corporate bonds
Available for sale:
Less than 12 months, Estimated Fair Value	0	0
Less than 12 months, Gross Unrealized Losses	0	0
Greater than 12 months, Estimated Fair Value	43,235	42,425
Greater than 12 months, Gross Unrealized Losses	$ (2,765)	$ (3,575)

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 326
-SubTopic 30
-Section 50
-Paragraph 5
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-Publisher FASB
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Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-URI http://asc.fasb.org/extlink&oid=118939692&loc=d3e27337-111563

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Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset.

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