FEDERAL HOME LOAN BANK ADVANCES (Details) - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Contractual Maturity, Amount
Overnight	$ 10,000	$ 185,000
2018	290,000	315,083
2019	863	1,291
Total FHLB advances except overnight advances	290,863	316,374
Total FHLB advances	$ 300,863	$ 501,374
Weighted Average Rate
Overnight (as a percent)	2.08%	1.53%
2018 (as a percent)	2.22%	1.59%
2019 (as a percent)	0.81%	0.94%
Weighted Average Rate for total FHLB advances except overnight advances (as a percent)	2.22%	1.59%
Weighted Average Rate for total FHLB advances (as a percent)	2.21%	1.57%