Summary of Significant Accounting Policies - Leases (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Jan. 01, 2019
Summary of Significant Accounting Policies
Existence of option to extend	true
Right to use asset	$ 86,437	$ 82,787
Lease Liability	$ 88,163	$ 83,043
Minimum
Summary of Significant Accounting Policies
Lease terms	12 months
Renewal term	24 years
Maximum
Summary of Significant Accounting Policies
Renewal term	24 years
Adjustments | ASU 2016- 02
Summary of Significant Accounting Policies
Right to use asset			$ 82,200
Lease Liability			$ 82,200