SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES Operating Lease (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2019	Dec. 31, 2018
Accounting Policies [Abstract]
Operating Lease, Weighted Average Discount Rate, Percent	5.795%
2019	$ 7,314
2020	7,906
2021	7,050
2022	5,728
2023	4,701
Thereafter	9,069
Total lease payments	41,768
Less: Interest	9,271
Operating lease liabilities	32,497	$ 0
Operating Lease, Payments	$ 2,000