Trade Accounts Receivable (Tables)

3 Months Ended

Mar. 31, 2013

Trade Accounts Receivable

Schedule of trade accounts receivable

	As of
	March 31,			December 31,
	2013			2012
	(In thousands)
Trade accounts receivable	$	180,111		$	188,463
Contracts in process	33,872			39,804
Total trade accounts receivable	213,983			228,267
Allowance for doubtful accounts	(16,051		)	(16,894		)
Total trade accounts receivable, net	$	197,932		$	211,373