Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Property and equipment, accumulated depreciation and amortization	$ 823,757	$ 762,544
Special preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Special preferred stock, shares issued (in shares)	3	3
Special preferred stock, shares outstanding (in shares)	3	3
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares outstanding (in shares)	45,996,537	46,121,859