LEASES (Impact of Adoption of 842) (Details) - USD ($) $ in Thousands	Jun. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
Assets
Operating lease right-of-use-assets	$ 17,077	$ 17,200	$ 0
Prepaid and other current assets	3,087		7,330
Total assets	267,334		258,385
Liabilities
Operating lease liabilities - current	4,099		0
Operating lease liabilities - non-current	13,671		0
Accounts payable and accrued expenses	17,028		25,030
Other long-term liabilities	405		1,334
Total liabilities	116,030		113,030
Total stockholders' equity	151,304		145,355
Accumulated earnings	76,084		71,435
Total liabilities & stockholders' equity	$ 267,334		$ 258,385