Summary of Significant Accounting Policies - Leases and Intangible Assets (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) Asset	Jan. 01, 2019 USD ($)
Operating lease assets and liabilities
Operating lease, right-of-use assets	$ 17,997
Operating lease, liability	$ 18,639
Infinite-lived intangible assets
Number of infinite-lived intangible assets | Asset	1
ASU 2016-02 | Restatement Adjustment
Operating lease assets and liabilities
Operating lease, right-of-use assets		$ 23,300
Operating lease, liability		$ 24,000