Trade Accounts Receivable (Tables)

12 Months Ended

Dec. 31, 2012

Trade Accounts Receivable.

Trade Accounts Receivable

	As of December 31,
	2012			2011
	(In thousands)
Trade accounts receivable	$	188,463		$	203,774
Contracts in process	39,804			27,670
Total trade accounts receivable	228,267			231,444
Allowance for doubtful accounts	(16,894		)	(18,484		)
Total trade accounts receivable, net	$	211,373		$	212,960