Fair Value of Assets and Liabilities - Level 3 Measurements (Details) - Level 3 $ in Thousands	Dec. 31, 2016 USD ($)
Trade Name
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value	$ 680
Trade Name | Relief from royalty | Discount rate:
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.18
Trade Name | Relief from royalty | Royalty rate:
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.01
Customer relationships
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Fair value	$ 0
Customer relationships | Excess earnings | Discount rate:
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.18
Customer relationships | Excess earnings | Attrition rate:
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Unobservable Inputs	0.05