Balance Sheet Accounts and Supplemental Disclosures (Tables)

12 Months Ended

Dec. 31, 2013

Balance Sheet Accounts and Supplemental Disclosures [Abstract]

Receivables

	December 31,
	2013		2012
Billed	$	68,474	$	59,496
Unbilled		514,238		439,372
Retainages due upon contract completion		806		354
Total	$	583,518	$	499,222

Property, Plant and Equipment

     Property, plant and equipment consisted of the following (in thousands):

	December 31,
	2013			2012
Land	$	10,656		$	10,656
Buildings and leasehold improvements		88,390			85,803
Furniture, fixtures and equipment		337,737			298,082
Assets under construction		38,030			45,928
Software and other		29,619			33,310
		504,432			473,779
Accumulated depreciation and amortization		(258,372	)		(222,419	)
Total	$	246,060		$	251,360

Goodwill by Segment

     The company's goodwill balances by reportable business segment are as follows (in thousands):

	Launch Vehicles			Satellites and Space Systems			Advanced Space Programs			Total
Balance at December 31, 2013		$	10,310		$	51,837		$	9,113		$	71,260

Accounts Payable and Accrued Expenses

       Accounts payable and accrued expenses consisted of the following (in thousands):

	December 31,
	2013		2012
Contract related accruals	$	147,689	$	169,146
Employee compensation and benefits related liabilities		78,024		77,241
Accounts payable		50,650		4,037
Other		5,268		6,689
Total	$	281,631	$	257,113

Cash Flow Supplemental Disclosures

       Cash payments for interest and income taxes were as follows (in thousands):

	Years Ended December 31,
	2013			2012			2011
Interest paid		$	4,040		$	6,733		$	4,158
Income taxes paid			11,480			2,699			2,242