LEASES - Maturity of Lease Liabilities (Details) $ in Thousands	Dec. 31, 2019 USD ($)
Operating lease liabilities maturing during the next:
One year	$ 3,569
Two years	1,853
Three years	1,743
Four years	1,793
Five years	301
Thereafter	0
Total undiscounted cash flows	9,259
Lease liabilities on balance sheet:
Long-term	4,650
Total lease liabilities	7,527
Accrued Liabilities
Lease liabilities on balance sheet:
Short-term	$ 2,877