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SECURITIES AVAILABLE FOR SALE - Amortized Cost and Fair Values of AFS Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 489,196	$ 469,607
Gross Unrealized Gains	5,319	2,432
Gross Unrealized Losses	4,294	6,195
Fair Value	490,221	465,844
States and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	149,618	144,596
Gross Unrealized Gains	4,399	1,919
Gross Unrealized Losses	114	1,511
Fair Value	153,903	145,004
GSE residential CMOs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	74,298	110,421
Gross Unrealized Gains	599	332
Gross Unrealized Losses	1,896	2,689
Fair Value	73,001	108,064
Private label residential CMOs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	17	144
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	1
Fair Value	17	143
Private label commercial CMOs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	77,603	75,911
Gross Unrealized Gains	111	55
Gross Unrealized Losses	595	921
Fair Value	77,119	75,045
Asset-backed and other
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	187,660	138,535
Gross Unrealized Gains	210	126
Gross Unrealized Losses	1,689	1,073
Fair Value	$ 186,181	$ 137,588

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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-Section 50
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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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