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SECURITIES AVAILABLE FOR SALE - Amortized Cost and Fair Values of AFS Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 452,828	$ 411,706
Gross Unrealized Gains	2,859	7,496
Gross Unrealized Losses	6,268	3,894
Fair Value	449,419	415,308
States and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	169,209	153,803
Gross Unrealized Gains	2,426	6,133
Gross Unrealized Losses	1,717	478
Fair Value	169,918	159,458
GSE residential MBSs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost		48,600
Gross Unrealized Gains		930
Gross Unrealized Losses		0
Fair Value		49,530
GSE residential CMOs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	117,417	113,658
Gross Unrealized Gains	82	296
Gross Unrealized Losses	3,627	2,835
Fair Value	113,872	111,119
Private label residential CMOs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	614	999
Gross Unrealized Gains	1	4
Gross Unrealized Losses	0	0
Fair Value	615	1,003
Private label commercial CMOs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	18,694	7,809
Gross Unrealized Gains	0	0
Gross Unrealized Losses	290	156
Fair Value	18,404	7,653
Asset-backed and other
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	146,894	86,837
Gross Unrealized Gains	350	133
Gross Unrealized Losses	634	425
Fair Value	$ 146,610	$ 86,545

X

- Definition

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).

+ References

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-Publisher FASB
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-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
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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).

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