Fair Value Measurements-Recurring and Nonrecurring Fair Value Measurements (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Debt instrument, interest rate terms 90 days    
Impairment of goodwill $ 49,314 $ 0 $ 0
Measured on a recurring basis | Cash and cash equivalents      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Money market funds [1] 11 11  
Measured on a recurring basis | Cash and cash equivalents | Level 1      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Money market funds 11 11 [1]  
Measured on a recurring basis | Other noncurrent assets | Currency swap      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative instruments not designated as hedging instruments, assets, at fair value [2] 6,060 3,140  
Measured on a recurring basis | Other noncurrent assets | Level 2 | Currency swap      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Derivative instruments not designated as hedging instruments, assets, at fair value 6,060 3,140  
Measured on a recurring basis | Other noncurrent liabilities      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Contingent earnout liability [3] 1,921 1,153  
Measured on a recurring basis | Other noncurrent liabilities | Level 3      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Contingent earnout liability 1,921 1,153  
Garden City Group | Measured on a nonrecurring basis      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Business combination, contingent consideration, liability   0 $ 2,000
Intangible asset impairment   $ 1,271  
Buckley Scott      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Contingent earnout liability, maximum potential earnout $ 2,027    
[1] The fair values of the money market funds were based on recently quoted market prices and reported transactions in an active marketplace. Money market funds are included on the Company's Consolidated Balance Sheets in "Cash and cash equivalents."
[2] The fair value of the Company's cross currency basis swap was derived from a discounted cash flow analysis based on the terms of the swap and the forward curves for foreign currency rates and interest rates adjusted for the counterparty's credit risk. The fair value of this cross currency basis swap is included in "Other noncurrent assets" on the Company's Consolidated Balance Sheets, based upon the term of the cross currency basis swap.
[3] The fair value of the contingent earnout liability for the Buckley Scott acquisition was estimated using an internally-prepared probability-weighted discounted cash flow analysis. The fair value analysis relied upon both Level 2 data (publicly observable data such as market interest rates and capital structures of peer companies) and Level 3 data (internal data such as the Company's operating projections). As such, these are Level 3 fair value measurements. The valuation is sensitive to Level 3 data, with the maximum possible earnout of $2,027,000. As such, the fair value is not expected to vary materially from the balance recorded. The fair value of the contingent earnout liability is included in "Other accrued liabilities" on the Company's Consolidated Balance Sheets, based upon the term of the contingent earnout agreement.