Summary of Significant Accounting Policies - Adoption of New Accounting Standards (Details) - USD ($) $ in Thousands		Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Lease right-of-use assets		$ 197,365	$ 146,000	$ 0
Lease liabilities		$ 218,847	178,000	$ 0
Accounting Standards Update 2017-08
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment for new accounting standards	[1]		(583)
Accounting Standards Update 2017-08 | Retained Earnings
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative adjustment for new accounting standards	[1]		$ (583)

[1] See Note 2- "Summary of Significant Accounting Policies" of the "Notes to Consolidated Financial Statements" under Part II, Item 8 of this report for additional details.