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Accounts Receivable (Tables)
 6 Months Ended
Jun. 30, 2016
Receivables [Abstract]  
Summary of Accounts Receivable

 

(Table only in thousands)

 

June 30,

2016

 

 

December 31,

2015

 

Trade receivables

 

$

11,836

 

 

$

12,800

 

Contract receivables

 

 

73,997

 

 

 

86,129

 

Allowance for doubtful accounts

 

 

(1,268

)

 

 

(1,151

)

 

 

$

84,565

 

 

$

97,778