Revenue from Contracts with Customers - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Contract Assets
Change due to acquisitions / disposals	$ (10)		$ 10,356
Change related to credit allowance	31		(5)
Other changes in the period	(11,608)		927
Contract Liabilities
Change due to acquisitions / disposals	52		36,523
Other changes in the period	21,135		44,620
Contract assets:
Balance at beginning of period	29,900	$ 18,622	18,622
Balance at end of period	18,313		29,900
Costs and estimated earnings in excess of billings, less allowance for credit losses	18,313		29,900
Contract liabilities:
Balance at beginning of period	307,380	226,237	226,237
Balance at end of period	328,567		307,380
Total contract liabilities	328,567		$ 307,380
Revenue related to our contract liabilities	$ 220,600
Calculated under Revenue Guidance in Effect before Topic 606 [Member]
Contract liabilities:
Revenue related to our contract liabilities		$ 167,800