Loan Sales and Servicing Activities (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013 item	Sep. 30, 2012	Sep. 30, 2013 item	Sep. 30, 2012	Dec. 31, 2012 item
Cash flows :
Sales proceeds	$ 4,515,106	$ 2,654,125	$ 13,210,810	$ 5,112,530
Servicing fees received	16,403	3,940	38,104	8,327
Net servicing (advances) recoveries	(717)	1,009	(4,375)	2,191
Quarter-end information:
Unpaid principal balance of loans outstanding at period-end	22,776,613	6,444,618	22,776,613	6,444,618
Loans delinquent 30-89 days	380,070	93,069	380,070	93,069
Loans delinquent 90 or more days or in foreclosure or bankruptcy	247,269	39,950	247,269	39,950
Mortgage servicing portfolio
Mortgage loans held for sale	490,088		490,088		417,742
Total loans serviced	52,872,334		52,872,334		28,152,549
Amount subserviced for the Company	596,271		596,271		421,380
Delinquent mortgage loans:
30 days	573,205		573,205		379,537
60 days	199,757		199,757		183,450
90 days or more	1,590,539		1,590,539		964,698
Total delinquent mortgage loans	2,363,501		2,363,501		1,527,685
Loans pending foreclosure	1,681,597		1,681,597		1,366,016
Total delinquent mortgage loans and loans pending foreclosure	4,045,098		4,045,098		2,893,701
Custodial funds managed by the Company	655,552		655,552		413,642
Number of top states for which geographical loan distribution was measured	5		5		5
California
Mortgage servicing portfolio
Total loans serviced	18,952,692		18,952,692		10,696,508
Virginia
Mortgage servicing portfolio
Total loans serviced	2,984,671		2,984,671
Texas
Mortgage servicing portfolio
Total loans serviced	2,962,697		2,962,697		1,223,382
Florida
Mortgage servicing portfolio
Total loans serviced	2,395,337		2,395,337		1,385,286
Colorado
Mortgage servicing portfolio
Total loans serviced	2,109,970		2,109,970		1,299,295
Washington
Mortgage servicing portfolio
Total loans serviced					1,143,849
All other states
Mortgage servicing portfolio
Total loans serviced	23,466,967		23,466,967		12,404,229
Affiliated entities
Mortgage servicing portfolio
Total loans serviced, excluding loans held for sale	29,555,254		29,555,254		16,552,939
Agencies
Mortgage servicing portfolio
Total loans serviced, excluding loans held for sale	21,725,393		21,725,393		9,860,284
Private investors
Mortgage servicing portfolio
Total loans serviced, excluding loans held for sale	1,101,599		1,101,599		1,321,584
Servicing rights owned
Mortgage servicing portfolio
Mortgage loans held for sale	490,088		490,088		417,742
Total loans serviced	23,266,701		23,266,701		11,599,610
Amount subserviced for the Company	42,201		42,201		45,562
Delinquent mortgage loans:
30 days	307,399		307,399		191,884
60 days	85,367		85,367		60,886
90 days or more	168,468		168,468		112,847
Total delinquent mortgage loans	561,234		561,234		365,617
Loans pending foreclosure	69,889		69,889		75,329
Total delinquent mortgage loans and loans pending foreclosure	631,123		631,123		440,946
Custodial funds managed by the Company	389,267		389,267		263,562
Servicing rights owned | Agencies
Mortgage servicing portfolio
Total loans serviced, excluding loans held for sale	21,725,393		21,725,393		9,860,284
Servicing rights owned | Private investors
Mortgage servicing portfolio
Total loans serviced, excluding loans held for sale	1,051,220		1,051,220		1,321,584
Contract servicing and subservicing
Mortgage servicing portfolio
Total loans serviced	29,605,633		29,605,633		16,552,939
Amount subserviced for the Company	554,070		554,070		375,818
Delinquent mortgage loans:
30 days	265,806		265,806		187,653
60 days	114,390		114,390		122,564
90 days or more	1,422,071		1,422,071		851,851
Total delinquent mortgage loans	1,802,267		1,802,267		1,162,068
Loans pending foreclosure	1,611,708		1,611,708		1,290,687
Total delinquent mortgage loans and loans pending foreclosure	3,413,975		3,413,975		2,452,755
Custodial funds managed by the Company	266,285		266,285		150,080
Contract servicing and subservicing | Affiliated entities
Mortgage servicing portfolio
Total loans serviced, excluding loans held for sale	29,555,254		29,555,254		16,552,939
Contract servicing and subservicing | Private investors
Mortgage servicing portfolio
Total loans serviced, excluding loans held for sale	$ 50,379		$ 50,379