Property and Equipment (Details Textual) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Interest costs capitalized	$ 400	$ 3,700
Depreciation expense	107,900	103,500	$ 98,900
Assets under finance leases	17,100
Accumulated amortization related to capital leases	14,200	13,200
Depreciation expense related to capital leases	$ 1,023	$ 1,000	$ 1,000