Accrued Liabilities Accrued Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Accrued Liabilities [Abstract]
Employee-related Liabilities, Current	$ 40,101	$ 33,249
Accrued Marketing Costs, Current	15,294	10,238
Taxes Payable, Current	22,922	11,189
Accrued Utilities, Current	40,498	21,403
Interest Payable	873	65
Accrued Customer Credits, Current	2,772	3,325
Accrued Professional Fees, Current	4,482	2,049
Accrued Inventory	871	1,188
Other Accrued Liabilities, Current	9,776	4,664
Accrued expenses	$ 137,589	$ 87,370