Summary of Business Organization, Operations and Significant Accounting Policies - Accounting Standards Implementation (Details) - USD ($) $ in Thousands		Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle	[1]		$ 0
Operating Lease Right-of-Use Assets, Net		$ 121,527		$ 0
Present value of future minimum lease payments		$ 123,499
Minimum | Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Operating Lease Right-of-Use Assets, Net			140,000
Maximum | Accounting Standards Update 2016-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Present value of future minimum lease payments			147,000
Tax Rate Reduction Related To Pension Liability | Accounting Standards Update 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle			700
Tax Effect Of Tax Reform On Items Remaining in AOCI, Currency Translation | Accounting Standards Update 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle			(1,700)
Distributions In Excess Of Earnings | Accounting Standards Update 2018-02
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Cumulative effect of new accounting principle			$ (1,000)

[1] On January 1, 2019, the Company adopted Accounting Standard Update ("ASU") No. 2018-02 "Income Statement-Reporting Comprehensive Income-Reclassification of Certain Tax Effects from Accumulated Other Comprehensive Income". Refer to Note 1 - Summary of Business Organization, Operations and Significant Accounting Policies - Recent Accounting Pronouncements for further information.