Employee Benefits (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($) Employee shares	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
Defined Contribution Plans [Abstract]
U.S defined contribution	$ 9,080	$ 8,928	$ 9,153
Employer discretionary contribution amount	300	300	600
Employee Stock Ownership Plan (ESOP), Debt Structure [Abstract]
Provision for expense in connection with ESOP	2,500	2,600	2,200
Net periodic benefit cost	$ (25)	(262)	(653)
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	49,100
Shares released from trust (in shares) | shares	49,100
Total remaining balance of shares in the ESOP (in shares) | shares	200