RECENT ACCOUNTING PRONOUNCEMENTS - (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Jan. 01, 2019
RECENT ACCOUNTING PRONOUNCEMENTS
Lease, practical expedients	true
Operating lease right-of-use assets	$ 25,581
Operating lease liabilities	$ 22,111
ASU 2016-02
RECENT ACCOUNTING PRONOUNCEMENTS
Operating lease right-of-use assets		$ 26,300
Operating lease liabilities		$ 22,600