Employee Benefit Plans (Schedule of Allocation of Plan Assets) (Details) - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	$ 211,802	$ 212,506
Other liabilities	(8,860)	(12,248)
Total
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	167,244	134,986
Total | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	39,467	42,369
Total | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	127,777	92,617
Total | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
U.S. small-cap
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	2,319	2,751
U.S. small-cap | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	2,319	2,751
U.S. small-cap | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
U.S. small-cap | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
U.S. mid-cap
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	1,397	1,182
U.S. mid-cap | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	1,397	1,182
U.S. mid-cap | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
U.S. mid-cap | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
U.S. large-cap
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
U.S. large-cap | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
U.S. large-cap | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
U.S. large-cap | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
Non-U.S.
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
Non-U.S. | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
Non-U.S. | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
Non-U.S. | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
U.S. government securities
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	50,610	43,829
U.S. government securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	35,751	38,436
U.S. government securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	14,859	5,393
U.S. government securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
Non-U.S. government securities
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	2,242	2,092
Non-U.S. government securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
Non-U.S. government securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	2,242	2,092
Non-U.S. government securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
U.S. governement asset and mortgage backed securities
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	7,667
U.S. governement asset and mortgage backed securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
U.S. governement asset and mortgage backed securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	7,667
U.S. governement asset and mortgage backed securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
Corporate notes and bonds
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	108,023	68,762
Corporate notes and bonds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
Corporate notes and bonds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	108,023	68,762
Corporate notes and bonds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
State and local government securities
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	2,653	3,480
State and local government securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
State and local government securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	2,653	3,480
State and local government securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
Other investments
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	5,223
Other investments | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
Other investments | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	5,223
Other investments | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	0	0
Other fixed income
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	53,418	82,765
Short-term investments
Defined Benefit Plan Disclosure [Line Items]
Total fair value of plan assets	$ 0	$ 7,003