Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2015

Receivables [Abstract]

Schedule of accounts receivable

Accounts receivable consists of the following:

	December 31,
	2015			2014
	(In thousands)
Billed accounts receivable	$	115,068		$	134,040
Unbilled - scheduled billings	28,826			22,258
Costs and estimated earnings in excess of billings	27,737			19,994
	171,631			176,292
Less allowance for doubtful accounts	(2,130		)	(2,842		)
Accounts receivable, net	$	169,501		$	173,450

Schedule of activity in the allowance for doubtful accounts

The activity in the allowance for doubtful accounts consists of the following:

			Additions			Effect of foreign exchange rate changes
	Balance at beginning of period		Charge to cost and expense					Balance at end of period
				Deductions
				Write-offs
	(In thousands)
Year ended December 31, 2013	$	1,752	1,813	(1,312	)	82		$	2,335
Year ended December 31, 2014	$	2,335	730	(24	)	(199	)	$	2,842
Year ended December 31, 2015	$	2,842	311	(905	)	(118	)	$	2,130