Fair Value Measurement (Liabilities on Recurring Basis) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Financial liabilities measured at fair value on a recurring basis
Contingent Liability, Fair Value Disclosure	$ 17,054	$ 20,907
Total liabilities at fair value	17,054	20,907
Level 1
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 2
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
Financial liabilities measured at fair value on a recurring basis
Total liabilities at fair value	17,054	20,907
Income Approach Valuation Technique | Level 3
Financial liabilities measured at fair value on a recurring basis
Contingent Liability, Fair Value Disclosure	$ 17,054	$ 20,907