Current report of foreign issuer pursuant to Rules 13a-16 and 15d-16 Amendments

Fair Value Measurement (Schedule of Fair Value Measurements of Assets and Liabilities Utilizing Level 3 Inputs) (Details)

v3.8.0.1
Fair Value Measurement (Schedule of Fair Value Measurements of Assets and Liabilities Utilizing Level 3 Inputs) (Details) - USD ($)
$ in Thousands
9 Months Ended 12 Months Ended
Sep. 30, 2017
Dec. 31, 2016
Reconciliation of Fair Value Measurements of Assets and Liabilities Utilizing Level 3 Inputs [Roll Forward]    
Fair value at the beginning of the period $ 2,619 $ 6,991
Settlements (3,997) (3,500)
Change in fair value recognized in earnings 1,378 (872)
Fair value at the end of the period $ 2,619