Accounts Receivable (Tables)

6 Months Ended

Jun. 30, 2018

Receivables [Abstract]

Summary of Accounts Receivable

(Table only in thousands)	June 30, 2018			December 31, 2017
Contract receivables	$	63,990		$	60,543
Trade receivables		8,040			11,603
Allowance for doubtful accounts		(4,234	)		(4,156	)
Total accounts receivable	$	67,796		$	67,990