Employee Benefits (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) Employee shares	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Defined Contribution Plans [Abstract]
U.S defined contribution	$ 9,457	$ 9,080	$ 8,928
Employer discretionary contribution amount	600	300	300
Employee Stock Ownership Plan (ESOP), Debt Structure [Abstract]
Provision for expense in connection with ESOP	2,300	2,500	2,600
Net periodic benefit cost	$ (27)	(25)	(262)
Postretirement Medical Benefits [Abstract]
Number of former union employees covered by the plan | Employee	16
Supplemental Executive Retirement Plan [Member]
Employee Stock Ownership Plan (ESOP), Debt Structure [Abstract]
Benefit obligation outstanding	$ 0	0
Net periodic benefit cost	$ 0	$ 0	$ 0
Employee Stock Ownership Plan and Trust (ESOP) [Member]
Employee Stock Ownership Plan (ESOP), Debt Structure [Abstract]
Additional shares contributed to ESOP (in shares) | shares	44,700
Shares released from trust (in shares) | shares	44,700
Total remaining balance of shares in the ESOP (in shares) | shares	200