Leases (Details) - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2020	Dec. 31, 2019
Quantitative Lease Disclosures [Abstract]
Renewal option period		5 years
Assets [Abstract]
Operating lease right-of-use assets		$ 29,958	$ 36,020
Liabilities [Abstract]
Sundry payables and accrued expenses		8,719	8,739
Noncurrent operating lease liabilities		22,450	28,376
Total operating lease liabilities		$ 31,169	$ 37,115
Operating Leases [Abstract]
Weighted average remaining lease term		5 years	5 years 7 months 6 days
Weighted average discount rate		3.60%	3.70%
Lease Expense [Abstract]
Operating lease expense	[1]	$ 9,203	$ 8,940
Excluded expenses of non lease		2,500	2,400
Cash paid for the amounts included in the measurement of lease liabilities [Abstract]
Operating cash flows from operating leases		9,087	8,758
Right-of-use assets obtained in exchange for new lease obligations [Abstract]
Operating leases		2,986	4,663
Minimum Lease Payments [Abstract]
2021		8,945
2022		7,231
2023		5,819
2024		3,931
2025		2,960
Thereafter		5,551
Total lease payments		34,437
Less: Interest		(3,268)
Total operating lease liabilities		$ 31,169	$ 37,115
Maximum [Member]
Quantitative Lease Disclosures [Abstract]
Remaining operating lease terms		10 years

[1] Excludes expenses of approximately $2.5 million and 2.4 million for the years ended December 31, 2020 and 2019, respectively, related to non-lease components such as maintenance, property taxes, etc., and operating lease expense for leases with an initial term of 12 months or less, which is not material.