Transactions with FAFC (Details) (USD $)	0 Months Ended		3 Months Ended		9 Months Ended
	Aug. 23, 2012	Jun. 01, 2010	Sep. 30, 2012 Office_Buildings	Sep. 30, 2011	Sep. 30, 2012 Office_Buildings	Sep. 30, 2011	Dec. 31, 2011
Investments in and Advances to Related Parties [Line Items]
Liability for uncertain tax positions, noncurrent			$ 52,700,000		$ 52,700,000		$ 19,300,000
Additional Seperation distribution of FAFC					5,730,000
Cash payment to related party					621,000	(18,678,000)
Payments to repurchase of common stock					226,629,000	176,512,000
Common Stock [Member]
Investments in and Advances to Related Parties [Line Items]
Stock repurchased during period, shares					(10,029,000)
FAFC Indemnification Under Tax Sharing Agreement Member [Member]
Investments in and Advances to Related Parties [Line Items]
Liability for uncertain tax positions, noncurrent			44,100,000		44,100,000		10,400,000
FAFC [Member]
Investments in and Advances to Related Parties [Line Items]
Reduction in other operating expenses			1,600,000	1,700,000	4,800,000	4,900,000
Due from related parties			41,000,000		41,000,000		34,400,000
Separation and Distribution Agreement amount		250,000,000
Stock issued during period, value		242,600,000
Cash payment to related party		7,400,000
Separation and Distribution Agreement, period to dispose of shares					5 years
Stock repurchased during period, shares	10,433,265
Payments to repurchase of common stock	227,700,000
Number of office buildings			2		2
Rent expense, operating leases			1,100,000	3,300,000
FAFC [Member] | Common Stock [Member]
Investments in and Advances to Related Parties [Line Items]
Separation shares issued		12,933,265
FAFC [Member] | FAFC Indemnification Under Tax Sharing Agreement Member [Member]
Investments in and Advances to Related Parties [Line Items]
Additional Seperation distribution of FAFC					5,730,000
Related Parties Of FAFC [Member]
Investments in and Advances to Related Parties [Line Items]
Revenues from transactions with related party			6,800,000	3,500,000	14,300,000	11,600,000
Expenses from transactions with related party			$ 300,000	$ 200,000	$ 900,000	$ 3,900,000