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SECURITIES AVAILABLE FOR SALE - Schedule of Maturity of Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Dec. 31, 2018
Available for sale, Amortized Cost
Within 1 year	$ 420
Over 1 year to 5 years	34,117
Over 5 years to 10 years	65,026
Over 10 years	101,037
Total bonds and obligations	200,600
Mortgage-backed securities	549,039
Amortized Cost	749,639	$ 737,141
Available for sale, Fair Value
Within 1 year	421
Over 1 year to 5 years	34,365
Over 5 years to 10 years	65,440
Over 10 years	101,715
Total bonds and obligations	201,941
Mortgage-backed securities	545,294
Total securities available for sale	$ 747,235	$ 725,837

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