Fair Value (Tables)
 12 Months Ended
Dec. 31, 2013
Fair Value Disclosures [Abstract]  
Fair value measurements on recurring basis
For assets and liabilities measured at fair value on a recurring basis in the consolidated balance sheet, the table below categorizes fair value measurements across the three levels as of December 31, 2013 (in thousands):

Year Ended December 31, 2013
Quoted Prices in Active Markets (Level 1)
 
Significant Observable Inputs (Level 2)
 
Significant Unobservable Inputs (Level 3)
 
Total
Liabilities:
 
 
 
 
 
 
 

Contingent purchase price consideration
$
—

 
$
—

 
$
19,954

 
$
19,954

Derivative
$
—

 
$
1,719

 
$
—

 
$
1,719


Year Ended December 31, 2012
Quoted Prices in Active Markets (Level 1)
 
Significant Observable Inputs (Level 2)
 
Significant Unobservable Inputs (Level 3)
 
Total
Liabilities
 
 
 
 
 
 
 
   Contingent purchase price consideration
$
—

 
$
—

 
$
49,183

 
$
49,183

   Derivatives
$
—

 
$
2,639

 
$
—

 
$
2,639