Consolidated Balance Sheets (Parenthetical) - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Accumulated depreciation	$ 1,373,950,000	$ 1,218,105,000
Accumulated amortization of finite lived intangible assets	13,133,000	11,065,000
Allowance for doubtful accounts	$ 2,749,000	$ 2,075,000
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	3,500,000,000	3,500,000,000
Common stock, shares issued (in shares)	179,483,397	188,219,605
Common stock, shares outstanding (in shares)	179,483,397	188,219,605
Mandatorily Redeemable Preferred Stock
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, redemption value (in dollars per share)	$ 1,000	$ 1,000
Preferred stock, dividend rate (as a percent)	8.00%	8.00%
Preferred stock, shares authorized (in shares)	350,000,000	350,000,000
Preferred stock, shares issued (in shares)	7,130,000	7,130,000
Preferred stock, shares outstanding (in shares)	7,130,000	7,130,000
Term loan facility
Unamortized deferred financing costs and debt discount	$ 10,993,000	$ 14,879,000
Senior notes
Unamortized deferred financing costs and debt discount	$ 35,702,000	$ 26,206,000