Nature of Business and Basis of Presentation - Summary of Effect of Adopting Topic 842 on Consolidated Balance Sheet (Details) - USD ($)		Sep. 30, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Prepaid expenses		$ 18,994,000		$ 17,722,000
Property and equipment, net		1,038,692,000		894,953,000
Operating lease right-of-use assets, net		148,911,000
Intangible assets, net		141,125,000		141,128,000
Operating lease liability		163,926,000
Other long-term obligations		1,246,000		4,801,000
Accumulated deficit		(164,506,000)		$ (120,361,000)
Prior to Adoption [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Prepaid expenses			$ 17,722,000
Property and equipment, net			894,953,000
Intangible assets, net			141,128,000
Other long-term obligations			4,801,000
Accumulated deficit			(120,361,000)
ASU 842 [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Prepaid expenses			17,528,000
Property and equipment, net			897,456,000
Operating lease right-of-use assets, net		0	140,715,000
Intangible assets, net			138,625,000
Operating lease liability		$ 0	155,878,000
Other long-term obligations			1,716,000
Accumulated deficit			(132,633,000)
ASU 842 [Member] | Effect of Adoption [Member]
New Accounting Pronouncements Or Change In Accounting Principle [Line Items]
Prepaid expenses	[1]		(194,000)
Property and equipment, net	[1]		2,503,000
Operating lease right-of-use assets, net	[1]		140,715,000
Intangible assets, net	[1]		(2,503,000)
Operating lease liability	[1]		155,878,000
Other long-term obligations	[1]		(3,085,000)
Accumulated deficit	[1]		$ (12,272,000)

[1] Prepaid expenses, favorable lease intangible and deferred lease expense included in other long-term obligations were reclassed to the related right-of-use asset upon adoption of Topic 842 and represents a non-cash investing activity.