Pension and Postretirement Benefits - Fair Value of the Plans' Assets by Asset Class (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement domestic pension plans	$ 10,416	$ 10,479
Pension Plans | Quoted Prices in Active Markets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement domestic pension plans	10,212	10,269
Pension Plans | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement domestic pension plans	204	210
Pension Plans | Aggregate fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement domestic pension plans	5,352	5,453
Pension Plans | Aggregate fixed income securities | Quoted Prices in Active Markets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement domestic pension plans	5,352	5,453
Pension Plans | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement domestic pension plans	4,580	4,459
Pension Plans | Equity Securities | Quoted Prices in Active Markets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement domestic pension plans	4,580	4,459
Pension Plans | Cash
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement domestic pension plans	280	357
Pension Plans | Cash | Quoted Prices in Active Markets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement domestic pension plans	280	357
Pension Plans | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement domestic pension plans	204	210
Pension Plans | Equity Securities | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement domestic pension plans	204	210
Foreign Pension Plans
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement domestic pension plans	10,576	9,705
Foreign Pension Plans | Quoted Prices in Active Markets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement domestic pension plans	10,188	9,330
Foreign Pension Plans | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement domestic pension plans	388	375
Foreign Pension Plans | Aggregate fixed income securities
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement domestic pension plans	4,082	4,372
Foreign Pension Plans | Aggregate fixed income securities | Quoted Prices in Active Markets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement domestic pension plans	4,082	4,372
Foreign Pension Plans | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement domestic pension plans	4,518	4,908
Foreign Pension Plans | Equity Securities | Quoted Prices in Active Markets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement domestic pension plans	4,130	4,533
Foreign Pension Plans | Equity Securities | Significant Other Observable Inputs (Level 2)
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement domestic pension plans	388	375
Foreign Pension Plans | Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement domestic pension plans	1,976	425
Foreign Pension Plans | Equity Securities | Quoted Prices in Active Markets (Level 1)
Defined Benefit Plan Disclosure [Line Items]
Fair value measurement domestic pension plans	$ 1,976	$ 425