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Acquisition and Disposition (Tables)
 3 Months Ended
Mar. 31, 2017
Business Combinations [Abstract]  
Schedule of reconciliation of beginning and ending balances of contingent earnout consideration
(in thousands)
 
Fair Value
Accrued contingent consideration liability as of December 31, 2016
 
$
29,725

Accretion of interest
 
1,041

Adjustments to fair value
 
—

Accrued contingent consideration liability as of March 31, 2017
 
$
30,766