Loans - Home Loan: Risk Profile by Vintage, Geography, Lien Priority and Interest Rate Type (Detail) - USD ($) $ in Millions	Sep. 30, 2016	Dec. 31, 2015	Sep. 30, 2015
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 238,019	$ 229,851	$ 213,329
Consumer Portfolio Segment [Member]
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 72,285	$ 70,372
Percentage of portfolio	100.00%	100.00%
Consumer Portfolio Segment [Member] | Home loan
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 22,448	$ 25,227
Consumer Portfolio Segment [Member] | Home loan | Origination Year Concentration Risk | Home Loans Receivable
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 22,448	$ 25,227
Percentage of portfolio	100.00%	100.00%
Consumer Portfolio Segment [Member] | Home loan | Origination Year Concentration Risk | Home Loans Receivable | Origination during or before 2007
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 10,035	$ 11,515
Percentage of portfolio	44.70%	45.60%
Consumer Portfolio Segment [Member] | Home loan | Origination Year Concentration Risk | Home Loans Receivable | 2008
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 2,549	$ 3,023
Percentage of portfolio	11.40%	12.00%
Consumer Portfolio Segment [Member] | Home loan | Origination Year Concentration Risk | Home Loans Receivable | 2009
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 1,268	$ 1,595
Percentage of portfolio	5.70%	6.30%
Consumer Portfolio Segment [Member] | Home loan | Origination Year Concentration Risk | Home Loans Receivable | 2010
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 1,812	$ 2,305
Percentage of portfolio	8.10%	9.20%
Consumer Portfolio Segment [Member] | Home loan | Origination Year Concentration Risk | Home Loans Receivable | 2011
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 2,020	$ 2,652
Percentage of portfolio	9.00%	10.50%
Consumer Portfolio Segment [Member] | Home loan | Origination Year Concentration Risk | Home Loans Receivable | 2012
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 1,345	$ 1,665
Percentage of portfolio	6.00%	6.60%
Consumer Portfolio Segment [Member] | Home loan | Origination Year Concentration Risk | Home Loans Receivable | 2013
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 554	$ 628
Percentage of portfolio	2.40%	2.50%
Consumer Portfolio Segment [Member] | Home loan | Origination Year Concentration Risk | Home Loans Receivable | 2014
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 626	$ 711
Percentage of portfolio	2.80%	2.80%
Consumer Portfolio Segment [Member] | Home loan | Origination Year Concentration Risk | Home Loans Receivable | 2015
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 1,096	$ 1,133
Percentage of portfolio	4.80%	4.50%
Consumer Portfolio Segment [Member] | Home loan | Origination Year Concentration Risk | Home Loans Receivable | 2016
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 1,143
Percentage of portfolio	5.10%
Consumer Portfolio Segment [Member] | Home loan | Geographic Concentration Risk | Home Loans Receivable
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 22,448	$ 25,227
Percentage of portfolio	100.00%	100.00%
Consumer Portfolio Segment [Member] | Home loan | Geographic Concentration Risk | Home Loans Receivable | California
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 5,183	$ 5,884
Percentage of portfolio	23.00%	23.40%
Consumer Portfolio Segment [Member] | Home loan | Geographic Concentration Risk | Home Loans Receivable | New York
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 2,032	$ 2,171
Percentage of portfolio	9.10%	8.60%
Consumer Portfolio Segment [Member] | Home loan | Geographic Concentration Risk | Home Loans Receivable | Maryland
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 1,450	$ 1,539
Percentage of portfolio	6.50%	6.10%
Consumer Portfolio Segment [Member] | Home loan | Geographic Concentration Risk | Home Loans Receivable | Illinois
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 1,290	$ 1,490
Percentage of portfolio	5.70%	5.90%
Consumer Portfolio Segment [Member] | Home loan | Geographic Concentration Risk | Home Loans Receivable | Virginia
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 1,241	$ 1,354
Percentage of portfolio	5.50%	5.40%
Consumer Portfolio Segment [Member] | Home loan | Geographic Concentration Risk | Home Loans Receivable | New Jersey
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 1,158	$ 1,293
Percentage of portfolio	5.20%	5.10%
Consumer Portfolio Segment [Member] | Home loan | Geographic Concentration Risk | Home Loans Receivable | Louisiana
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 1,017	$ 1,096
Percentage of portfolio	4.50%	4.30%
Consumer Portfolio Segment [Member] | Home loan | Geographic Concentration Risk | Home Loans Receivable | Florida
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 985	$ 1,146
Percentage of portfolio	4.40%	4.50%
Consumer Portfolio Segment [Member] | Home loan | Geographic Concentration Risk | Home Loans Receivable | Arizona
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 935	$ 1,076
Percentage of portfolio	4.20%	4.30%
Consumer Portfolio Segment [Member] | Home loan | Geographic Concentration Risk | Home Loans Receivable | Texas
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 797
Percentage of portfolio	3.60%
Consumer Portfolio Segment [Member] | Home loan | Geographic Concentration Risk | Home Loans Receivable | Washington
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment		$ 919
Percentage of portfolio		3.60%
Consumer Portfolio Segment [Member] | Home loan | Geographic Concentration Risk | Home Loans Receivable | Other
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 6,360	$ 7,259
Percentage of portfolio	28.30%	28.80%
Consumer Portfolio Segment [Member] | Home loan | Lien Type Concentration Risk | Home Loans Receivable
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 22,448	$ 25,227
Percentage of portfolio	100.00%	100.00%
Consumer Portfolio Segment [Member] | Home loan | Lien Type Concentration Risk | Home Loans Receivable | 1st lien
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 21,177	$ 23,912
Percentage of portfolio	94.30%	94.80%
Consumer Portfolio Segment [Member] | Home loan | Lien Type Concentration Risk | Home Loans Receivable | 2nd lien
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 1,271	$ 1,315
Percentage of portfolio	5.70%	5.20%
Consumer Portfolio Segment [Member] | Home loan | Interest Rate Type Concentration Risk | Home Loans Receivable
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 22,448	$ 25,227
Percentage of portfolio	100.00%	100.00%
Consumer Portfolio Segment [Member] | Home loan | Interest Rate Type Concentration Risk | Home Loans Receivable | Fixed rate
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 5,111	$ 5,015
Percentage of portfolio	22.70%	19.90%
Consumer Portfolio Segment [Member] | Home loan | Interest Rate Type Concentration Risk | Home Loans Receivable | Adjustable rate
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 17,337	$ 20,212
Percentage of portfolio	77.30%	80.10%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Origination Year Concentration Risk | Home Loans Receivable
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 6,982	$ 6,700
Percentage of portfolio	31.10%	26.60%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Origination Year Concentration Risk | Home Loans Receivable | Origination during or before 2007
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 2,200	$ 2,559
Percentage of portfolio	9.70%	10.10%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Origination Year Concentration Risk | Home Loans Receivable | 2008
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 139	$ 157
Percentage of portfolio	0.70%	0.60%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Origination Year Concentration Risk | Home Loans Receivable | 2009
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 86	$ 97
Percentage of portfolio	0.40%	0.40%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Origination Year Concentration Risk | Home Loans Receivable | 2010
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 86	$ 97
Percentage of portfolio	0.40%	0.40%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Origination Year Concentration Risk | Home Loans Receivable | 2011
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 150	$ 176
Percentage of portfolio	0.70%	0.70%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Origination Year Concentration Risk | Home Loans Receivable | 2012
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 1,047	$ 1,276
Percentage of portfolio	4.70%	5.10%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Origination Year Concentration Risk | Home Loans Receivable | 2013
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 492	$ 557
Percentage of portfolio	2.10%	2.20%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Origination Year Concentration Risk | Home Loans Receivable | 2014
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 595	$ 680
Percentage of portfolio	2.70%	2.70%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Origination Year Concentration Risk | Home Loans Receivable | 2015
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 1,064	$ 1,101
Percentage of portfolio	4.70%	4.40%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Origination Year Concentration Risk | Home Loans Receivable | 2016
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 1,123
Percentage of portfolio	5.00%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Geographic Concentration Risk | Home Loans Receivable
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 6,982	$ 6,700
Percentage of portfolio	31.10%	26.60%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | California
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 908	$ 871
Percentage of portfolio	4.00%	3.50%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | New York
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 1,293	$ 1,295
Percentage of portfolio	5.80%	5.10%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | Maryland
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 574	$ 511
Percentage of portfolio	2.60%	2.00%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | Illinois
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 101	$ 89
Percentage of portfolio	0.40%	0.40%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | Virginia
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 478	$ 428
Percentage of portfolio	2.10%	1.70%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | New Jersey
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 374	$ 353
Percentage of portfolio	1.70%	1.40%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | Louisiana
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 993	$ 1,069
Percentage of portfolio	4.40%	4.20%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | Florida
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 157	$ 157
Percentage of portfolio	0.70%	0.60%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | Arizona
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 90	$ 81
Percentage of portfolio	0.40%	0.40%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | Texas
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 690
Percentage of portfolio	3.10%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | Washington
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment		$ 113
Percentage of portfolio		0.40%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | Other
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 1,324	$ 1,733
Percentage of portfolio	5.90%	6.90%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Lien Type Concentration Risk | Home Loans Receivable
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 6,982	$ 6,700
Percentage of portfolio	31.10%	26.60%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Lien Type Concentration Risk | Home Loans Receivable | 1st lien
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 5,993	$ 5,705
Percentage of portfolio	26.70%	22.60%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Lien Type Concentration Risk | Home Loans Receivable | 2nd lien
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 989	$ 995
Percentage of portfolio	4.40%	4.00%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Interest Rate Type Concentration Risk | Home Loans Receivable
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 6,982	$ 6,700
Percentage of portfolio	31.10%	26.60%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Interest Rate Type Concentration Risk | Home Loans Receivable | Fixed rate
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 3,175	$ 2,751
Percentage of portfolio	14.10%	10.90%
Consumer Portfolio Segment [Member] | Home loan | Loans excluding Acquired Loans | Interest Rate Type Concentration Risk | Home Loans Receivable | Adjustable rate
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 3,807	$ 3,949
Percentage of portfolio	17.00%	15.70%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Origination Year Concentration Risk | Home Loans Receivable
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 15,466	$ 18,527
Percentage of portfolio	68.90%	73.40%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Origination Year Concentration Risk | Home Loans Receivable | Origination during or before 2007
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 7,835	$ 8,956
Percentage of portfolio	35.00%	35.50%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Origination Year Concentration Risk | Home Loans Receivable | 2008
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 2,410	$ 2,866
Percentage of portfolio	10.70%	11.40%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Origination Year Concentration Risk | Home Loans Receivable | 2009
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 1,182	$ 1,498
Percentage of portfolio	5.30%	5.90%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Origination Year Concentration Risk | Home Loans Receivable | 2010
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 1,726	$ 2,208
Percentage of portfolio	7.70%	8.80%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Origination Year Concentration Risk | Home Loans Receivable | 2011
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 1,870	$ 2,476
Percentage of portfolio	8.30%	9.80%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Origination Year Concentration Risk | Home Loans Receivable | 2012
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 298	$ 389
Percentage of portfolio	1.30%	1.50%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Origination Year Concentration Risk | Home Loans Receivable | 2013
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 62	$ 71
Percentage of portfolio	0.30%	0.30%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Origination Year Concentration Risk | Home Loans Receivable | 2014
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 31	$ 31
Percentage of portfolio	0.10%	0.10%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Origination Year Concentration Risk | Home Loans Receivable | 2015
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 32	$ 32
Percentage of portfolio	0.10%	0.10%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Origination Year Concentration Risk | Home Loans Receivable | 2016
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 20
Percentage of portfolio	0.10%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Geographic Concentration Risk | Home Loans Receivable
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 15,466	$ 18,527
Percentage of portfolio	68.90%	73.40%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | California
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 4,275	$ 5,013
Percentage of portfolio	19.00%	19.90%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | New York
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 739	$ 876
Percentage of portfolio	3.30%	3.50%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | Maryland
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 876	$ 1,028
Percentage of portfolio	3.90%	4.10%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | Illinois
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 1,189	$ 1,401
Percentage of portfolio	5.30%	5.50%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | Virginia
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 763	$ 926
Percentage of portfolio	3.40%	3.70%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | New Jersey
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 784	$ 940
Percentage of portfolio	3.50%	3.70%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | Louisiana
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 24	$ 27
Percentage of portfolio	0.10%	0.10%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | Florida
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 828	$ 989
Percentage of portfolio	3.70%	3.90%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | Arizona
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 845	$ 995
Percentage of portfolio	3.80%	3.90%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | Texas
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 107
Percentage of portfolio	0.50%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | Washington
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment		$ 806
Percentage of portfolio		3.20%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Geographic Concentration Risk | Home Loans Receivable | Other
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 5,036	$ 5,526
Percentage of portfolio	22.40%	21.90%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Lien Type Concentration Risk | Home Loans Receivable
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 15,466	$ 18,527
Percentage of portfolio	68.90%	73.40%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Lien Type Concentration Risk | Home Loans Receivable | 1st lien
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 15,184	$ 18,207
Percentage of portfolio	67.60%	72.20%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Lien Type Concentration Risk | Home Loans Receivable | 2nd lien
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 282	$ 320
Percentage of portfolio	1.30%	1.20%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Interest Rate Type Concentration Risk | Home Loans Receivable
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 15,466	$ 18,527
Percentage of portfolio	68.90%	73.40%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Interest Rate Type Concentration Risk | Home Loans Receivable | Fixed rate
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 1,936	$ 2,264
Percentage of portfolio	8.60%	9.00%
Consumer Portfolio Segment [Member] | Home loan | Acquired Loans | Interest Rate Type Concentration Risk | Home Loans Receivable | Adjustable rate
Loans and Leases Receivable Disclosure [Line Items]
Loans held for investment	$ 13,530	$ 16,263
Percentage of portfolio	60.30%	64.40%