Accrued Liabilities Long-term liabilities (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Accrued Liabilities [Abstract]
Operating Lease, Liability, Noncurrent	$ 44,281	$ 28,896
Accrued Employee Benefits	1,114	1,131
Accrued Rent	1,466	1,642
Liabilities for contracts	404	472
Finance Lease, Liability, Noncurrent	2,298	0
Other Accrued Liabilities, Noncurrent	320	679
OTHER LONG-TERM LIABILITIES	$ 49,883	$ 32,820