LEASES - Assets and liabilities (Details) - USD ($) $ in Thousands	Jan. 01, 2019	Mar. 31, 2020	Dec. 31, 2019
Leases [Abstract]
Operating lease right-of-use assets		$ 10,129	$ 9,623
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]		Other Assets
Operating lease liabilities		$ 10,205	$ 9,651
Operating Lease, Liability, Statement of Financial Position [Extensible List]		Other Liabilities
Lease, Practical Expedients, Package [true false]	true