Employee and Retiree Benefit Plans (Fair Value Measurements of Retirement Plan Assets within Fair Value of Hierarchy) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Domestic Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 321,782	$ 327,749
Foreign Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	197,575	193,933
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	519,357	521,682	$ 560,978
Level 1 [Member] | Domestic Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	92,478	85,341
Level 1 [Member] | Foreign Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		734
Level 1 [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	92,478	86,075
Level 2 [Member] | Domestic Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	195,190	208,479
Level 2 [Member] | Foreign Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	197,575	193,199
Level 2 [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	392,765	401,678
Level 3 [Member] | Domestic Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	34,114	33,929
Level 3 [Member] | Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	34,114	33,929
Equity Securities [Member] | Domestic Plans [Member] | US Core Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	61,554	51,878
Equity Securities [Member] | Domestic Plans [Member] | U.S. Small/Midcap [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	23,103	26,964
Equity Securities [Member] | Domestic Plans [Member] | Hedged Funds and Other Alternative Strategies [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	48,113	50,878
Equity Securities [Member] | Domestic Plans [Member] | International Commingled Trust Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	67,451	72,205
Equity Securities [Member] | Domestic Plans [Member] | Emerging Market Commingled Equity Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	16,006	16,873
Equity Securities [Member] | Foreign Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	74,108	104,718
Equity Securities [Member] | Level 1 [Member] | Domestic Plans [Member] | US Core Equity [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	61,554	51,878
Equity Securities [Member] | Level 1 [Member] | Domestic Plans [Member] | U.S. Small/Midcap [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	23,103	26,964
Equity Securities [Member] | Level 2 [Member] | Domestic Plans [Member] | Hedged Funds and Other Alternative Strategies [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	13,999	16,949
Equity Securities [Member] | Level 2 [Member] | Domestic Plans [Member] | International Commingled Trust Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	67,451	72,205
Equity Securities [Member] | Level 2 [Member] | Domestic Plans [Member] | Emerging Market Commingled Equity Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	16,006	16,873
Equity Securities [Member] | Level 2 [Member] | Foreign Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	74,108	104,718
Equity Securities [Member] | Level 3 [Member] | Domestic Plans [Member] | Hedged Funds and Other Alternative Strategies [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	34,114	33,929
Fixed Income Securities [Member] | Domestic Plans [Member] | International Commingled Trust Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	13,486	15,332
Fixed Income Securities [Member] | Domestic Plans [Member] | U.S. Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	78,473	80,681
Fixed Income Securities [Member] | Domestic Plans [Member] | Emerging Market Mutual Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	5,775	6,439
Fixed Income Securities [Member] | Foreign Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	97,075	67,494
Fixed Income Securities [Member] | Level 2 [Member] | Domestic Plans [Member] | International Commingled Trust Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	13,486	15,332
Fixed Income Securities [Member] | Level 2 [Member] | Domestic Plans [Member] | U.S. Fixed Income [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	78,473	80,681
Fixed Income Securities [Member] | Level 2 [Member] | Domestic Plans [Member] | Emerging Market Mutual Fund [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	5,775	6,439
Fixed Income Securities [Member] | Level 2 [Member] | Foreign Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	97,075	67,494
Diversified Pooled Fund [Member] | Foreign Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	21,463	20,987
Diversified Pooled Fund [Member] | Level 2 [Member] | Foreign Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	21,463	20,987
Cash and Equivalents [Member] | Domestic Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	7,821	6,499
Cash and Equivalents [Member] | Foreign Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	4,929	734
Cash and Equivalents [Member] | Level 1 [Member] | Domestic Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	7,821	6,499
Cash and Equivalents [Member] | Level 1 [Member] | Foreign Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets		$ 734
Cash and Equivalents [Member] | Level 2 [Member] | Foreign Plans [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 4,929