SECURITIES - Available for Sale Securities in a Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands	Sep. 30, 2019	Dec. 31, 2018
Available for sale:
Less than 12 months, Estimated Fair Value	$ 98,144	$ 99,812
Less than 12 months, Gross Unrealized Losses	(652)	(779)
Greater than 12 months, Estimated Fair Value	226,186	424,638
Greater than 12 months, Gross Unrealized Losses	(5,147)	(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	4,987	29,050
Greater than 12 months, Gross Unrealized Losses	(13)	(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	76	21,273
Greater than 12 months, Gross Unrealized Losses	0	(339)
U.S. GSE residential mortgage-backed securities
Available for sale:
Less than 12 months, Estimated Fair Value	4,855	0
Less than 12 months, Gross Unrealized Losses	(17)	0
Greater than 12 months, Estimated Fair Value	45,344	88,762
Greater than 12 months, Gross Unrealized Losses	(541)	(3,036)
U.S. GSE residential collateralized mortgage obligations
Available for sale:
Less than 12 months, Estimated Fair Value	81,276	46,452
Less than 12 months, Gross Unrealized Losses	(610)	(141)
Greater than 12 months, Estimated Fair Value	95,027	172,468
Greater than 12 months, Gross Unrealized Losses	(1,033)	(5,813)
U.S. GSE commercial mortgage-backed securities
Available for sale:
Less than 12 months, Estimated Fair Value	4,875	0
Less than 12 months, Gross Unrealized Losses	(16)	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	7,138	46,705
Less than 12 months, Gross Unrealized Losses	(9)	(623)
Greater than 12 months, Estimated Fair Value	13,938	43,933
Greater than 12 months, Gross Unrealized Losses	(124)	(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	43,352	42,425
Greater than 12 months, Gross Unrealized Losses	$ (2,648)	$ (3,575)

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- Definition

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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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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