Accounts Receivable (Tables)

3 Months Ended

Mar. 31, 2018

Receivables [Abstract]

Summary of Accounts Receivable

(Table only in thousands)	March 31, 2018			December 31, 2017
Contract receivables	$	59,532		$	60,543
Trade receivables		8,395			11,603
Allowance for doubtful accounts		(4,131	)		(4,156	)
Total accounts receivable	$	63,796		$	67,990