Transactions with FAFC (Details) (USD $)	12 Months Ended			0 Months Ended		3 Months Ended	12 Months Ended									12 Months Ended				0 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Aug. 23, 2012 FAFC [Member]	Jun. 01, 2010 FAFC [Member]	Dec. 31, 2011 FAFC [Member]	Dec. 31, 2012 FAFC [Member] Office_Buildings	Dec. 31, 2011 FAFC [Member]	Dec. 31, 2010 FAFC [Member]	Dec. 31, 2012 Related Parties Of FAFC [Member]	Dec. 31, 2011 Related Parties Of FAFC [Member]	Dec. 31, 2010 Related Parties Of FAFC [Member]	Jun. 02, 2010 Promissory Note To FAFC [Member] Notes Payable, Other Payables [Member] FAFC [Member]	Dec. 31, 2012 FAFC Indemnification Under Tax Sharing Agreement Member [Member]	Dec. 31, 2011 FAFC Indemnification Under Tax Sharing Agreement Member [Member]	Dec. 31, 2012 FAFC Indemnification Under Tax Sharing Agreement Member [Member] FAFC [Member]	Dec. 31, 2012 Common Stock [Member]	Dec. 31, 2011 Common Stock [Member]	Dec. 31, 2010 Common Stock [Member]	Jun. 01, 2010 Common Stock [Member] FAFC [Member]
Investments in and Advances to Related Parties [Line Items]
Reduction In Other Operating Expenses							$ 6,500,000	$ 6,400,000	$ 5,400,000
Contingent Tax Obligation Receivable						34,400,000	52,500,000	34,400,000
Liability for Uncertain Tax Positions, Noncurrent														44,100,000	10,400,000
Additional Separation distribution of FAFC	5,344,000	(13,038,000)														5,300,000
Payments for Repurchase of Stock From Related Party [Abstrct]
Seperation and Distribution Agreement, amount					250,000,000
Separation and Distribution Agreement, period to dispose of shares							5 years
Stockholders equity spin off shares issued																			12,933,000	12,933,265
Stock issued during period, value					242,600,000
Increase (Decrease) in Due to Related Parties, Current	621,000	(18,718,000)	13,278,000		7,400,000
Stock Repurchased During Period, Shares				10,433,265													10,029,000	9,516,000	1,637,000
Payments for Repurchase of Common Stock	226,629,000	176,512,000	30,171,000	227,700,000
Debt Instrument FAFC Transaction [Abstract]
Debt instrument, aggregate principal amount													19,900,000
Debt instrument, stated interest rate percentage													6.52%
Number of real estate properties							2
Operating leases, rent expense	52,300,000	63,200,000	57,000,000			4,400,000	4,400,000		4,500,000
Sales Revenue, Services, Other										19,100,000	15,000,000	21,400,000
Other Cost and Expense, Operating										$ 1,600,000	$ 4,200,000	$ 11,800,000