Supplemental Balance Sheet, Income Statement and Cash Flow Information - Acquisitions of Businesses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Supplemental cash flow information
Cash paid for income taxes	$ 6,553	$ 11,383	$ 20,581
Cash paid for interest, net of capitalized interest	174,357	202,803	191,986
Net change in accounts payable related to capital expenditures	(7,624)	(8,556)	(35,227)
Non-cash increase in assets attributable to redeemable noncontrolling interest in subsidiary		43,928	142,875
Acquisitions of businesses:
Fair value of assets acquired	2,929	48,053	280,709
Goodwill		11,436	5,690
Liabilities assumed		(34,489)	(55,742)
Shares issuance as consideration (non-cash financing activity)			(178,993)
Cash paid for acquisitions of businesses	2,929	25,000	51,664
Cash and restricted cash acquired in acquisitions of businesses		(4,141)	(63,983)
Cash (acquired in) paid for acquisitions of businesses, net	$ (2,929)	$ (20,859)	$ 12,319