Fair Value Measurement (Liabilities on Recurring Basis) (Details) - USD ($) $ in Thousands	Jun. 30, 2015	Dec. 31, 2014
Financial liabilities measured at fair value on a recurring basis
Total liabilities at fair value	$ 3,481	$ 7,665
Income approach valuation technique [Member]
Financial liabilities measured at fair value on a recurring basis
Contingent Liability, Fair Value Disclosure	3,481	7,665
Level 1 [Member]
Financial liabilities measured at fair value on a recurring basis
Contingent Liability, Fair Value Disclosure	0	0
Level 2 [Member]
Financial liabilities measured at fair value on a recurring basis
Contingent Liability, Fair Value Disclosure	0	0
Total liabilities at fair value	0	0
Level 3 [Member]
Financial liabilities measured at fair value on a recurring basis
Total liabilities at fair value	3,481	7,665
Level 3 [Member] | Income approach valuation technique [Member]
Financial liabilities measured at fair value on a recurring basis
Contingent Liability, Fair Value Disclosure	$ 3,481	$ 7,665