Schedule - Mortgage Loans on Real Estate - Conventional Loans (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 57,106	$ 55,387	$ 39,524
Conventional Loans [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	138
Carrying Amount of Mortgages	169,936
Principal amount of loan subject to delinquent principal or "interest"	1,667
Conventional Loans [Member] | Other [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	10
Final maturity date Start	Mar. 19, 2017
Final Maturity Date End	Mar. 21, 2033
Carrying Amount of Mortgages	11,342
Conventional Loans [Member] | Other One [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	7
Final maturity date Start	Aug. 20, 2014
Final Maturity Date End	Dec. 16, 2030
Carrying Amount of Mortgages	4,770
Conventional Loans [Member] | TEXAS | Texas [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	17
Final maturity date Start	Jan. 21, 2015
Final Maturity Date End	Aug. 16, 2031
Carrying Amount of Mortgages	19,587
Principal amount of loan subject to delinquent principal or "interest"	1,667
Conventional Loans [Member] | TEXAS | Texas One [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	10
Final maturity date Start	Apr. 23, 2018
Final Maturity Date End	Nov. 18, 2030
Carrying Amount of Mortgages	6,080
Conventional Loans [Member] | ARIZONA | Arizona [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	6
Final maturity date Start	Feb. 10, 2023
Final Maturity Date End	Sep. 14, 2031
Carrying Amount of Mortgages	10,718
Conventional Loans [Member] | ARIZONA | Arizona One [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	7
Final maturity date Start	Jan. 01, 2014
Final Maturity Date End	May 02, 2033
Carrying Amount of Mortgages	6,741
Conventional Loans [Member] | NORTH CAROLINA | North Carolina [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	6
Final maturity date Start	Jun. 11, 2021
Final Maturity Date End	Dec. 27, 2033
Carrying Amount of Mortgages	6,185
Conventional Loans [Member] | NORTH CAROLINA | North Carolina One [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	4
Final maturity date Start	Dec. 20, 2016
Final Maturity Date End	May 22, 2032
Carrying Amount of Mortgages	4,447
Conventional Loans [Member] | VIRGINIA | Virginia [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	7
Final maturity date Start	Jan. 30, 2023
Final Maturity Date End	Jul. 22, 2033
Carrying Amount of Mortgages	17,452
Conventional Loans [Member] | VIRGINIA | Virginia One [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	2
Final maturity date Start	Jun. 01, 2017
Final Maturity Date End	Aug. 21, 2027
Carrying Amount of Mortgages	1,189
Conventional Loans [Member] | OHIO | Ohio [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	6
Final maturity date Start	Oct. 27, 2025
Final Maturity Date End	Apr. 21, 2028
Carrying Amount of Mortgages	10,663
Conventional Loans [Member] | MICHIGAN | Michigan [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	6
Final maturity date Start	Feb. 10, 2026
Final Maturity Date End	May 10, 2033
Carrying Amount of Mortgages	9,031
Conventional Loans [Member] | MISSOURI | Missouri [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	4
Final maturity date Start	Jun. 27, 2016
Final Maturity Date End	Oct. 31, 2033
Carrying Amount of Mortgages	5,728
Conventional Loans [Member] | MISSOURI | Missouri One [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	2
Final maturity date Start	Aug. 31, 2018
Final Maturity Date End	Aug. 31, 2018
Carrying Amount of Mortgages	721
Conventional Loans [Member] | Georgia [Member] | Georgia [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	3
Final maturity date Start	Dec. 26, 2017
Final Maturity Date End	Dec. 14, 2027
Carrying Amount of Mortgages	2,060
Conventional Loans [Member] | Georgia [Member] | Georgia One [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	3
Final maturity date Start	Mar. 24, 2019
Final Maturity Date End	Dec. 01, 2029
Carrying Amount of Mortgages	2,338
Conventional Loans [Member] | FLORIDA | Florida [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	4
Final maturity date Start	Nov. 01, 2025
Final Maturity Date End	Oct. 31, 2033
Carrying Amount of Mortgages	6,544
Conventional Loans [Member] | FLORIDA | Florida One [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	1
Final maturity date Start	Feb. 05, 2033
Final Maturity Date End	Feb. 05, 2033
Carrying Amount of Mortgages	1,339
Conventional Loans [Member] | OREGON | Oregon [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	2
Final maturity date Start	Sep. 08, 2025
Final Maturity Date End	May 13, 2030
Carrying Amount of Mortgages	4,991
Conventional Loans [Member] | OREGON | Oregon One [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	3
Final maturity date Start	Feb. 02, 2018
Final Maturity Date End	Jun. 13, 2021
Carrying Amount of Mortgages	1,668
Conventional Loans [Member] | TENNESSEE | Tennessee [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	5
Final maturity date Start	Aug. 01, 2022
Final Maturity Date End	Oct. 31, 2033
Carrying Amount of Mortgages	6,410
Conventional Loans [Member] | ALABAMA | Alabama [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	3
Final maturity date Start	Nov. 21, 2020
Final Maturity Date End	Oct. 01, 2026
Carrying Amount of Mortgages	5,006
Conventional Loans [Member] | ALABAMA | Alabama One [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	2
Final maturity date Start	Jun. 15, 2018
Final Maturity Date End	Oct. 27, 2018
Carrying Amount of Mortgages	902
Conventional Loans [Member] | INDIANA | Indiana [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	5
Final maturity date Start	Dec. 04, 2022
Final Maturity Date End	Feb. 26, 2032
Carrying Amount of Mortgages	5,645
Conventional Loans [Member] | CALIFORNIA | California [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	3
Final maturity date Start	Mar. 22, 2022
Final Maturity Date End	Dec. 13, 2026
Carrying Amount of Mortgages	3,399
Conventional Loans [Member] | CALIFORNIA | California One [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	1
Final maturity date Start	Dec. 28, 2024
Final Maturity Date End	Dec. 28, 2024
Carrying Amount of Mortgages	734
Conventional Loans [Member] | PENNSYLVANIA | Pennsylvania [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	2
Final maturity date Start	Sep. 29, 2025
Final Maturity Date End	Aug. 01, 2032
Carrying Amount of Mortgages	4,251
Conventional Loans [Member] | PENNSYLVANIA | Pennsylvania One [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	1
Final maturity date Start	Jun. 22, 2020
Final Maturity Date End	Jun. 22, 2020
Carrying Amount of Mortgages	2,090
Conventional Loans [Member] | MISSISSIPPI | Mississippi [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	1
Final maturity date Start	Dec. 01, 2032
Final Maturity Date End	Dec. 01, 2032
Carrying Amount of Mortgages	3,085
Conventional Loans [Member] | MISSISSIPPI | Mississippi One [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	2
Final maturity date Start	Jun. 12, 2018
Final Maturity Date End	Dec. 26, 2022
Carrying Amount of Mortgages	1,099
Conventional Loans [Member] | IOWA | Iowa [Member]
Mortgage Loans on Real Estate [Line Items]
Number of loans	3
Final maturity date Start	Sep. 30, 2019
Final Maturity Date End	May 30, 2026
Carrying Amount of Mortgages	3,721
Variable Interest Rate [Member] | Conventional Loans [Member] | Other [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	2.75%
Mortgage loan on maximum interest rate	6.75%
Variable Interest Rate [Member] | Conventional Loans [Member] | TEXAS | Texas [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	3.00%
Mortgage loan on maximum interest rate	7.25%
Variable Interest Rate [Member] | Conventional Loans [Member] | ARIZONA | Arizona [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	3.25%
Mortgage loan on maximum interest rate	7.50%
Variable Interest Rate [Member] | Conventional Loans [Member] | NORTH CAROLINA | North Carolina [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	3.75%
Mortgage loan on maximum interest rate	6.25%
Variable Interest Rate [Member] | Conventional Loans [Member] | VIRGINIA | Virginia [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	3.25%
Mortgage loan on maximum interest rate	7.00%
Variable Interest Rate [Member] | Conventional Loans [Member] | OHIO | Ohio [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	3.25%
Mortgage loan on maximum interest rate	4.25%
Variable Interest Rate [Member] | Conventional Loans [Member] | MICHIGAN | Michigan [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	3.12%
Mortgage loan on maximum interest rate	7.25%
Variable Interest Rate [Member] | Conventional Loans [Member] | MISSOURI | Missouri [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	4.25%
Mortgage loan on maximum interest rate	7.00%
Variable Interest Rate [Member] | Conventional Loans [Member] | Georgia [Member] | Georgia [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	3.75%
Mortgage loan on maximum interest rate	4.50%
Variable Interest Rate [Member] | Conventional Loans [Member] | FLORIDA | Florida [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	3.37%
Mortgage loan on maximum interest rate	5.74%
Variable Interest Rate [Member] | Conventional Loans [Member] | OREGON | Oregon [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	4.50%
Mortgage loan on maximum interest rate	7.25%
Variable Interest Rate [Member] | Conventional Loans [Member] | TENNESSEE | Tennessee [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	3.91%
Mortgage loan on maximum interest rate	6.75%
Variable Interest Rate [Member] | Conventional Loans [Member] | ALABAMA | Alabama [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	3.75%
Mortgage loan on maximum interest rate	4.25%
Variable Interest Rate [Member] | Conventional Loans [Member] | INDIANA | Indiana [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	3.75%
Mortgage loan on maximum interest rate	8.25%
Variable Interest Rate [Member] | Conventional Loans [Member] | CALIFORNIA | California [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	4.00%
Mortgage loan on maximum interest rate	4.50%
Variable Interest Rate [Member] | Conventional Loans [Member] | PENNSYLVANIA | Pennsylvania [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	4.25%
Mortgage loan on maximum interest rate	7.00%
Variable Interest Rate [Member] | Conventional Loans [Member] | MISSISSIPPI | Mississippi [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on maximum interest rate	7.25%
Variable Interest Rate [Member] | Conventional Loans [Member] | IOWA | Iowa [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	4.25%
Mortgage loan on maximum interest rate	6.95%
Fixed Interest Rate [Member] | Conventional Loans [Member] | Other One [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	6.75%
Mortgage loan on maximum interest rate	9.78%
Fixed Interest Rate [Member] | Conventional Loans [Member] | TEXAS | Texas One [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	7.00%
Mortgage loan on maximum interest rate	10.78%
Fixed Interest Rate [Member] | Conventional Loans [Member] | ARIZONA | Arizona One [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	7.50%
Mortgage loan on maximum interest rate	10.00%
Fixed Interest Rate [Member] | Conventional Loans [Member] | NORTH CAROLINA | North Carolina One [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	7.50%
Mortgage loan on maximum interest rate	9.85%
Fixed Interest Rate [Member] | Conventional Loans [Member] | VIRGINIA | Virginia One [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	7.50%
Mortgage loan on maximum interest rate	8.50%
Fixed Interest Rate [Member] | Conventional Loans [Member] | MISSOURI | Missouri One [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on maximum interest rate	8.25%
Fixed Interest Rate [Member] | Conventional Loans [Member] | Georgia [Member] | Georgia One [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	8.75%
Mortgage loan on maximum interest rate	10.25%
Fixed Interest Rate [Member] | Conventional Loans [Member] | FLORIDA | Florida One [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on maximum interest rate	7.50%
Fixed Interest Rate [Member] | Conventional Loans [Member] | OREGON | Oregon One [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	9.00%
Mortgage loan on maximum interest rate	9.90%
Fixed Interest Rate [Member] | Conventional Loans [Member] | ALABAMA | Alabama One [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on maximum interest rate	9.50%
Fixed Interest Rate [Member] | Conventional Loans [Member] | CALIFORNIA | California One [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on maximum interest rate	9.00%
Fixed Interest Rate [Member] | Conventional Loans [Member] | PENNSYLVANIA | Pennsylvania One [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on maximum interest rate	10.25%
Fixed Interest Rate [Member] | Conventional Loans [Member] | MISSISSIPPI | Mississippi One [Member]
Mortgage Loans on Real Estate [Line Items]
Mortgage loan on minimum interest rate	8.00%
Mortgage loan on maximum interest rate	9.50%
Minimum [Member] | Conventional Loans [Member] | Other [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | Other One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | TEXAS | Texas [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | TEXAS | Texas One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | ARIZONA | Arizona [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | ARIZONA | Arizona One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | NORTH CAROLINA | North Carolina [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | NORTH CAROLINA | North Carolina One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | VIRGINIA | Virginia [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | VIRGINIA | Virginia One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | OHIO | Ohio [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | MICHIGAN | Michigan [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | MISSOURI | Missouri [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | MISSOURI | Missouri One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | Georgia [Member] | Georgia [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | Georgia [Member] | Georgia One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | FLORIDA | Florida [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | FLORIDA | Florida One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | OREGON | Oregon [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | OREGON | Oregon One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | TENNESSEE | Tennessee [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | ALABAMA | Alabama [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | ALABAMA | Alabama One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | INDIANA | Indiana [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | CALIFORNIA | California [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | CALIFORNIA | California One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | PENNSYLVANIA | Pennsylvania [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | PENNSYLVANIA | Pennsylvania One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | MISSISSIPPI | Mississippi [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | MISSISSIPPI | Mississippi One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Minimum [Member] | Conventional Loans [Member] | IOWA | Iowa [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	0
Maximum [Member] | Conventional Loans [Member] | Other [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	3,000
Maximum [Member] | Conventional Loans [Member] | Other One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	2,000
Maximum [Member] | Conventional Loans [Member] | TEXAS | Texas [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	3,000
Maximum [Member] | Conventional Loans [Member] | TEXAS | Texas One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	2,000
Maximum [Member] | Conventional Loans [Member] | ARIZONA | Arizona [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	5,000
Maximum [Member] | Conventional Loans [Member] | ARIZONA | Arizona One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	3,000
Maximum [Member] | Conventional Loans [Member] | NORTH CAROLINA | North Carolina [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	2,000
Maximum [Member] | Conventional Loans [Member] | NORTH CAROLINA | North Carolina One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	3,000
Maximum [Member] | Conventional Loans [Member] | VIRGINIA | Virginia [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	6,000
Maximum [Member] | Conventional Loans [Member] | VIRGINIA | Virginia One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	1,000
Maximum [Member] | Conventional Loans [Member] | OHIO | Ohio [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	3,000
Maximum [Member] | Conventional Loans [Member] | MICHIGAN | Michigan [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	4,000
Maximum [Member] | Conventional Loans [Member] | MISSOURI | Missouri [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	2,000
Maximum [Member] | Conventional Loans [Member] | MISSOURI | Missouri One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	1,000
Maximum [Member] | Conventional Loans [Member] | Georgia [Member] | Georgia [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	2,000
Maximum [Member] | Conventional Loans [Member] | Georgia [Member] | Georgia One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	2,000
Maximum [Member] | Conventional Loans [Member] | FLORIDA | Florida [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	3,000
Maximum [Member] | Conventional Loans [Member] | FLORIDA | Florida One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	2,000
Maximum [Member] | Conventional Loans [Member] | OREGON | Oregon [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	4,000
Maximum [Member] | Conventional Loans [Member] | OREGON | Oregon One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	1,000
Maximum [Member] | Conventional Loans [Member] | TENNESSEE | Tennessee [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	3,000
Maximum [Member] | Conventional Loans [Member] | ALABAMA | Alabama [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	3,000
Maximum [Member] | Conventional Loans [Member] | ALABAMA | Alabama One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	1,000
Maximum [Member] | Conventional Loans [Member] | INDIANA | Indiana [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	2,000
Maximum [Member] | Conventional Loans [Member] | CALIFORNIA | California [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	2,000
Maximum [Member] | Conventional Loans [Member] | CALIFORNIA | California One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	1,000
Maximum [Member] | Conventional Loans [Member] | PENNSYLVANIA | Pennsylvania [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	4,000
Maximum [Member] | Conventional Loans [Member] | PENNSYLVANIA | Pennsylvania One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	3,000
Maximum [Member] | Conventional Loans [Member] | MISSISSIPPI | Mississippi [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	4,000
Maximum [Member] | Conventional Loans [Member] | MISSISSIPPI | Mississippi One [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	1,000
Maximum [Member] | Conventional Loans [Member] | IOWA | Iowa [Member]
Mortgage Loans on Real Estate [Line Items]
Size of loans	$ 2,000