Other Current Assets - Schedule Of Other Current Assets (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2018 USD ($) parcelofland	Dec. 31, 2017 USD ($)
Property, Plant and Equipment [Line Items]
Prepaid expenses	$ 18,412	$ 14,205
Other current assets	6,831	4,762
Land held for sale	7,000	7,000
Total	$ 32,243	25,967
Number of parcels of land, sold | parcelofland	1
Property and equipment, at cost, net	$ 127,535	$ 83,374
Number of parcels of land, held for sale | parcelofland	1
Land
Property, Plant and Equipment [Line Items]
Property and equipment, at cost, net	$ 3,000
Gain (loss) on disposition of property plant equipment	$ 82