Restricted Cash (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2020	Dec. 31, 2019	Mar. 31, 2019	Dec. 31, 2018
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents [Abstract]
Cash and cash equivalents	$ 316,437	$ 123,524	$ 71,960	$ 104,147
Restricted Cash Included in other current assets	34	353	0	0
Restricted Cash Included in other assets	19,480	19,678	20,153	20,278
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents	$ 335,951	$ 143,555	$ 92,113	$ 124,425
Loss Contingency, Settlement Agreement, Terms	The Company has restricted cash recorded in other assets related to proceeds from an inactive subsidiary of the Company which previously executed separate settlement and release agreements with two of its insurance carriers for an original total value of $35.0 million. The proceeds of both settlements are restricted and can only be used to pay claims and costs of defense associated with the subsidiary’s asbestos litigation. The proceeds of the settlement and release agreements have been deposited into interest bearing accounts that earned less than $0.1 million in each of the three months ended March 31, 2020 and 2019, respectively, offset by $0.2 million of net payments during each of the three months ended March 31, 2020 and 2019, respectively.
ProceedsOfSettlementAndReleaseAgreements	$ 100
PaymentsOfSettlementAndReleaseAgreements	$ 200