Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ in Thousands	6 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of change in accounting principle (ASU 2016-13, Financial Instruments - Credit Losses (Topic 326))	$ 1,307,383	$ 1,320,907	$ 1,318,013	$ 1,307,474	$ 1,257,318	$ 1,193,344
Cash and cash equivalents, restricted cash	$ 25,800		$ 25,100
Accounting Standards Update [Extensible List]	us-gaap:AccountingStandardsUpdate201613Member