Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2015

Receivables [Abstract]

Schedule of Accounts Receivable

Accounts receivable at December 31 consisted of the following (in thousands):

	2015			2014
Trade accounts receivable	$	102,277		$	105,421
Contract receivables:
Amounts billed	53,830			—
Costs in excess of billings	13,730			—
Total contract receivables	67,560			—
Total accounts receivables	169,837			105,421
Less allowance for doubtful accounts	(4,868		)	(4,280		)
Accounts receivable	$	164,969		$	101,141