Summary of Significant Accounting Policies - Schedule of Balance Sheet Adjustments (Details) - USD ($) $ in Thousands	Mar. 31, 2019	Jan. 01, 2019	Dec. 31, 2018	Mar. 31, 2018	Dec. 31, 2017
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Prepaids and deposits	$ 66,119	$ 61,149	$ 61,177
Operating lease right-of-use assets	115,647	120,358
Other noncurrent assets, net	259,506	256,620	263,892
Total assets	8,778,891	8,774,352	8,661,294
Accrued expenses and other	75,443	89,923	72,470
Operating lease liabilities	95,215	100,085
Other noncurrent liabilities	119,242	117,675	121,546
Total liabilities	4,599,355	4,619,487	4,505,820
Accumulated earnings	709,928	693,520	694,129
Total stockholders’ equity	4,179,536	4,154,865	4,155,474	$ 4,205,515	$ 4,177,385
Total liabilities and stockholders’ equity	$ 8,778,891	8,774,352	$ 8,661,294
Adoption of ASC 842 Increase (Decrease)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Prepaids and deposits		(28)
Operating lease right-of-use assets		120,358
Other noncurrent assets, net		(7,272)
Total assets		113,058
Accrued expenses and other		17,453
Operating lease liabilities		100,085
Other noncurrent liabilities		(3,871)
Total liabilities		113,667
Accumulated earnings		(609)
Total stockholders’ equity		(609)
Total liabilities and stockholders’ equity		$ 113,058