Accounts Receivable

9 Months Ended

Sep. 30, 2016

Receivables [Abstract]

ACCOUNTS RECEIVABLE

ACCOUNTS RECEIVABLE, NET

Accounts receivable consists of the following (in thousands):

	September 30, 2016			December 31, 2015
Trade accounts receivable	$	99,877		$	102,277
Contract receivables:
Amounts billed	46,414			53,830
Costs in excess of billings	13,544			13,730
Total contract receivables	59,958			67,560
Total accounts receivable	159,835			169,837
Less allowance for doubtful accounts	(4,401		)	(4,868		)
Accounts receivable	$	155,434		$	164,969

Contract receivables are primarily associated with developers, contractors and customers in connection with the Renewable Energy and Conservation segment. Costs in excess of billings principally represent revenues recognized on contracts that were not billable as of the balance sheet date. These amounts will be billed in accordance with contract terms, generally as certain milestones are reached or upon shipment. All of the costs in excess of billings are expected to be collected within one year. In situations where billings exceed revenues recognized, the excess is included in billings in excess of cost in the Consolidated Balance Sheet.