The cumulative amount of the reporting entity's undistributed earnings or deficit.

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Name:	us-gaap_RetainedEarningsAccumulatedDeficit
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Recent Accounting Developments Recent Accounting Developments (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Jan. 01, 2020	Dec. 31, 2019
Adjustments for New Accounting Pronouncements [Line Items]
Retained earnings	$ 1,524,878		$ 1,955,187
Cumulative Effect, Period of Adoption, Adjustment \| Accounting Standards Update 2016-13
Adjustments for New Accounting Pronouncements [Line Items]
Retained earnings		$ (1,600)