RESTRUCTURING, ACQUISITION, INTERGRATION, AND OTHER EXPENSES (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Restructuring and Related Activities [Abstract]
Restructuring expense	$ 1,713	$ 1,956	$ 3,399	$ 3,835
Acquisition and integration expense	0	68	0	71
Merger expenses	1,158	0	5,493	0
Total restructuring, acquisition, integration, and other expenses	$ 2,871	$ 2,024	$ 8,892	$ 3,906