Other Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Dec. 31, 2019
Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Abstract]
Prepaid accounts	$ 24,324	$ 11,345
Inventory and supplies	21,514	9,371
Various insurance and workers’ compensation receivables	14,421	12,143
Marketable securities - (deferred compensation plan)	6,579	4,895
Deferred financing costs	5,811	2,767
Utility, workers’ compensation escrow and lease deposits	4,630	4,222
Other receivables	7,292	7,528
Income taxes receivable	997	885
Deferred tax assets	826	418
Fair value of derivatives	0	6,886
Deferred registration statement costs	0	912
Other assets	$ 86,394	$ 61,372