INVESTMENT SECURITIES - AFS (Details) - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Available-for-Sale Debt Securities
Amortized Cost	$ 448,082	$ 524,112
Gross Unrealized Gains	3,583	3,590
Gross Unrealized Losses	(6,541)	(3,399)
Fair Value	445,124	524,303
U.S. Treasury securities and U.S. Government agencies
Available-for-Sale Debt Securities
Amortized Cost	238,418	309,042
Gross Unrealized Gains		1
Gross Unrealized Losses	(2,780)	(1,451)
Fair Value	235,638	307,592
Private label mortgage backed security
Available-for-Sale Debt Securities
Amortized Cost	2,484	3,065
Gross Unrealized Gains	1,365	1,384
Fair Value	3,849	4,449
Mortgage backed securities - residential
Available-for-Sale Debt Securities
Amortized Cost	117,129	105,644
Gross Unrealized Gains	970	1,603
Gross Unrealized Losses	(2,157)	(873)
Fair Value	115,942	106,374
Collateralized mortgage obligations
Available-for-Sale Debt Securities
Amortized Cost	76,528	87,867
Gross Unrealized Gains	441	371
Gross Unrealized Losses	(1,604)	(1,075)
Fair Value	75,365	87,163
Corporate bonds
Available-for-Sale Debt Securities
Amortized Cost	10,000	15,001
Gross Unrealized Gains	80	124
Fair Value	10,080	15,125
Trust preferred security
Available-for-Sale Debt Securities
Amortized Cost	3,523	3,493
Gross Unrealized Gains	727	107
Fair Value	$ 4,250	$ 3,600

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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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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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Amortized cost 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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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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