Employee Benefit Plans - Fair Value of Plan Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Real estate funds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 18,999	$ 8,904	$ 9,976
Defined Benefit Plan, Actual Return on Plan Assets Sold During Period	16
Actual return on plan assets still held	238	116
Business (dispositions) acquisitions	4,941
Purchases	6,490	5,629
Sales	(1,590)	(6,817)
U.S. Pension Plan, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	562,564	552,817	601,376
Business (dispositions) acquisitions	0	0
U.S. Pension Plan, Defined Benefit [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	221,799	251,132
U.S. Pension Plan, Defined Benefit [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	170,526	134,917
U.S. Pension Plan, Defined Benefit [Member] | Equity - Domestic [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	161,426	157,796
U.S. Pension Plan, Defined Benefit [Member] | Equity - Domestic [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	161,426	157,796
U.S. Pension Plan, Defined Benefit [Member] | Equity - Domestic [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
U.S. Pension Plan, Defined Benefit [Member] | Mutual funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	43,272	39,159
U.S. Pension Plan, Defined Benefit [Member] | Mutual funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	43,272	39,159
U.S. Pension Plan, Defined Benefit [Member] | Mutual funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
U.S. Pension Plan, Defined Benefit [Member] | Corporate bonds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	60,638	59,964
U.S. Pension Plan, Defined Benefit [Member] | Corporate bonds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
U.S. Pension Plan, Defined Benefit [Member] | Corporate bonds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	60,638	59,964
U.S. Pension Plan, Defined Benefit [Member] | Government securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	115,789	122,379
U.S. Pension Plan, Defined Benefit [Member] | Government securities [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	5,901	47,426
U.S. Pension Plan, Defined Benefit [Member] | Government securities [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	109,888	74,953
U.S. Pension Plan, Defined Benefit [Member] | Private Placement [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	11,200	6,751
U.S. Pension Plan, Defined Benefit [Member] | Private Placement [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	11,200	6,751
U.S. Pension Plan, Defined Benefit [Member] | Private Placement [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
U.S. Pension Plan, Defined Benefit [Member] | Real estate funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	45,494	42,391
U.S. Pension Plan, Defined Benefit [Member] | Real estate funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
U.S. Pension Plan, Defined Benefit [Member] | Real estate funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
U.S. Pension Plan, Defined Benefit [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	289	249
U.S. Pension Plan, Defined Benefit [Member] | Cash and Cash Equivalents [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
U.S. Pension Plan, Defined Benefit [Member] | Cash and Cash Equivalents [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Non-U.S. Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	148,514	159,436	$ 163,510
Business (dispositions) acquisitions	(3,967)	0
Non-U.S. Pension Plans, Defined Benefit [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	25,141	23,942
Non-U.S. Pension Plans, Defined Benefit [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	104,374	126,590
Non-U.S. Pension Plans, Defined Benefit [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	18,999	8,904
Non-U.S. Pension Plans, Defined Benefit [Member] | Common stocks [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	25,037	23,113
Non-U.S. Pension Plans, Defined Benefit [Member] | Common stocks [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	25,037	23,113
Non-U.S. Pension Plans, Defined Benefit [Member] | Common stocks [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Non-U.S. Pension Plans, Defined Benefit [Member] | Common stocks [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Non-U.S. Pension Plans, Defined Benefit [Member] | Fixed income investments [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	53,210	48,523
Non-U.S. Pension Plans, Defined Benefit [Member] | Fixed income investments [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Non-U.S. Pension Plans, Defined Benefit [Member] | Fixed income investments [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	53,210	48,523
Non-U.S. Pension Plans, Defined Benefit [Member] | Fixed income investments [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Non-U.S. Pension Plans, Defined Benefit [Member] | Common stock funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	46,565	45,058
Non-U.S. Pension Plans, Defined Benefit [Member] | Common stock funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Non-U.S. Pension Plans, Defined Benefit [Member] | Common stock funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	46,565	45,058
Non-U.S. Pension Plans, Defined Benefit [Member] | Common stock funds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Non-U.S. Pension Plans, Defined Benefit [Member] | Collective funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	23,978
Non-U.S. Pension Plans, Defined Benefit [Member] | Collective funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Non-U.S. Pension Plans, Defined Benefit [Member] | Collective funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	23,978
Non-U.S. Pension Plans, Defined Benefit [Member] | Collective funds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Non-U.S. Pension Plans, Defined Benefit [Member] | Real estate funds [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	8,626	8,904
Non-U.S. Pension Plans, Defined Benefit [Member] | Real estate funds [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Non-U.S. Pension Plans, Defined Benefit [Member] | Real estate funds [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Non-U.S. Pension Plans, Defined Benefit [Member] | Real estate funds [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	8,626	8,904
Non-U.S. Pension Plans, Defined Benefit [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	104	829
Non-U.S. Pension Plans, Defined Benefit [Member] | Cash and Cash Equivalents [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	104	829
Non-U.S. Pension Plans, Defined Benefit [Member] | Cash and Cash Equivalents [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Non-U.S. Pension Plans, Defined Benefit [Member] | Cash and Cash Equivalents [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Non-U.S. Pension Plans, Defined Benefit [Member] | Other plan assets [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	14,972	9,031
Non-U.S. Pension Plans, Defined Benefit [Member] | Other plan assets [Member] | Level 1 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	0	0
Non-U.S. Pension Plans, Defined Benefit [Member] | Other plan assets [Member] | Level 2 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	4,599	9,031
Non-U.S. Pension Plans, Defined Benefit [Member] | Other plan assets [Member] | Level 3 [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value of Plan Assets	$ 10,373	$ 0