Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements Fair Value Measurements (Fair Value, Liabilities Measured on a Recurring Basis, Unobservable Input Reconciliation) (Details)

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Fair Value Measurements Fair Value Measurements (Fair Value, Liabilities Measured on a Recurring Basis, Unobservable Input Reconciliation) (Details) (USD $)
In Thousands, unless otherwise specified
3 Months Ended
Mar. 31, 2014
Mar. 31, 2013
Dec. 31, 2013
Dec. 31, 2012
Fair Value Disclosures [Abstract]        
Financial and Nonfinancial Liabilities, Fair Value Disclosure $ 1,052 $ 4,384 $ 1,032 $ 6,832
Accretion Expense 20 135    
contingent consideration yearly payment 0 2,583    
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Gain (Loss) Included in Earnings $ 0 $ 0