Fair Value Measurements - Fair Value of Financial Instruments not carried at Fair Value (Details) - USD ($) $ in Thousands	Apr. 01, 2016	Dec. 31, 2015
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	$ 449,153	$ 440,821
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	464,578	445,837
Fair Value, Inputs, Level 1 [Member] | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	111,584	111,058
Fair Value, Inputs, Level 1 [Member] | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	148,452	140,156
Fair Value, Inputs, Level 2 [Member] | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	337,569	329,763
Fair Value, Inputs, Level 2 [Member] | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument, Fair Value Disclosure	$ 316,126	$ 305,681