Prepaid Expenses and Other Assets (Details) (USD $)	1 Months Ended	3 Months Ended		6 Months Ended
	Mar. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Jun. 30, 2011	Dec. 31, 2010
Prepaid Expenses and Other Assets
Mortgage and other investing receivables		$ 35,830,000			$ 18,870,000
Prepaid expenses		24,769,000			19,995,000
Furniture, fixtures and equipment, net		10,181,000			11,504,000
Construction contract costs incurred in excess of billings		6,579,000			9,372,000
Deferred tax asset		5,676,000			276,000
Investment in KEYW		121,000			22,779,000
Other assets		12,632,000			11,100,000
Prepaid expenses and other assets		95,788,000			93,896,000
KEYW Holding Corporation
Investment in The KEYW Holding Corporation ("KEYW")
Number of shares owned in equity method investee (in shares)					3,100,000
Ownership percentage in equity method investee (as a percent)					12.00%
Number of investee shares owned accounted for as trading securities (in shares)		2,600,000
Ownership percentage in investee accounted for as trading securities (as a percent)		10.00%
Carrying value of equity method investment					22,300,000
Fair value of trading securities		18,300,000
Number of shares under sales plan (in shares)	1,600,000
Number of shares sold (in shares)			500,000	500,000
Gain on sale of equity method investment			2,100,000
Unrealized loss on investment		883,000
Number of warrants owned (in shares)		50,000			50,000
Exercise price of warrants (in dollars per share)		$ 9.25			$ 9.25
Estimated fair value of warrants		$ 121,000			$ 466,000
Estimated fair value of warrants per warrant (in dollars per warrant)		$ 2.42			$ 9.32