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Revenue Recognition Revenue Contract Assets and Liabilities Rollforward (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2021
USD ($)
Revenue Recognition and Deferred Revenue [Abstract]  
Beginning balance, January 1, 2021 $ 98,388
Revenues recognized from beginning contract liability (58,754)
Cumulative catch-up adjustments 8,668
Increases due to amounts collected or due 91,347
Revenues recognized from current period increases (7,434)
Other (447)
Ending balance, March 31, 2021 $ 131,768