Summary of Significant Accounting Policies - Recently Issued and Adopted Standards (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2019	Jan. 01, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease, Practical Expedients, Package [true false]	true
Lease, Practical Expedient, Land Easement [true false]	true
Lease, Practical Expedient, Use of Hindsight [true false]	false
Operating leased asset		$ 276,618
Operating lease liability		276,223
Retained Earnings (Accumulated Deficit), Ending Balance	$ (17,335)	$ (20,982)
Restatement Adjustment [Member] | Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating leased asset			$ 183,000
Operating lease liability			$ 183,000