Accounting Policies - Consolidation of Variable Interest Entities (Details) - USD ($)
$ in Thousands |
Dec. 31, 2015 |
Dec. 31, 2014 |
| Variable Interest Entity [Line Items] |
|
|
| Loans held for investment in consolidated trusts, at amortized cost |
$ 708,111
|
$ 692,478
|
| Debt securities of consolidated trusts held by third parties |
713,536
|
424,214
|
| Farm & Ranch [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Other Liabilities |
5,400
|
2,900
|
| USDA Guarantees [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Unamortized Premium/(Discount) |
(200)
|
200
|
| Rural Utilities [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Unamortized Premium/(Discount) |
|
3,700
|
| Institutional Credit [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Unamortized Premium/(Discount) |
1,400
|
|
| Fair Value Adjustment |
|
2,400
|
| Off-balance sheet [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |
1,494,323
|
1,620,064
|
| Off-balance sheet [Member] | Farm & Ranch [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |
514,051
|
636,086
|
| Off-balance sheet [Member] | USDA Guarantees [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |
10,272
|
13,978
|
| Off-balance sheet [Member] | Rural Utilities [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |
0
|
0
|
| Off-balance sheet [Member] | Institutional Credit [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |
970,000
|
970,000
|
| Off-balance sheet [Member] | Corporate Segment [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |
0
|
0
|
| On-balance sheet [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Loans held for investment in consolidated trusts, at amortized cost |
708,111
|
692,478
|
| Debt securities of consolidated trusts held by third parties |
713,536
|
424,214
|
| On-balance sheet [Member] | Farm & Ranch [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Loans held for investment in consolidated trusts, at amortized cost |
708,111
|
421,355
|
| Debt securities of consolidated trusts held by third parties |
713,536
|
424,214
|
| On-balance sheet [Member] | USDA Guarantees [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Loans held for investment in consolidated trusts, at amortized cost |
0
|
0
|
| Debt securities of consolidated trusts held by third parties |
0
|
0
|
| On-balance sheet [Member] | Rural Utilities [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Loans held for investment in consolidated trusts, at amortized cost |
0
|
271,123
|
| Debt securities of consolidated trusts held by third parties |
0
|
0
|
| On-balance sheet [Member] | Institutional Credit [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Loans held for investment in consolidated trusts, at amortized cost |
0
|
0
|
| Debt securities of consolidated trusts held by third parties |
0
|
0
|
| On-balance sheet [Member] | Corporate Segment [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Loans held for investment in consolidated trusts, at amortized cost |
0
|
0
|
| Debt securities of consolidated trusts held by third parties |
0
|
0
|
| Investment Securities [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Unamortized Premium/(Discount) |
5,936
|
7,471
|
| Investment Securities [Member] | On-balance sheet [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net |
917,292
|
409,657
|
| Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |
918,121
|
412,690
|
| Investment Securities [Member] | On-balance sheet [Member] | Farm & Ranch [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net |
0
|
0
|
| Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |
0
|
0
|
| Investment Securities [Member] | On-balance sheet [Member] | USDA Guarantees [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net |
0
|
0
|
| Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |
0
|
0
|
| Investment Securities [Member] | On-balance sheet [Member] | Rural Utilities [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net |
0
|
0
|
| Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |
0
|
0
|
| Investment Securities [Member] | On-balance sheet [Member] | Institutional Credit [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net |
0
|
0
|
| Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |
0
|
0
|
| Investment Securities [Member] | On-balance sheet [Member] | Corporate Segment [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net |
917,292
|
409,657
|
| Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |
918,121
|
412,690
|
| Farmer Mac Guaranteed Securities: | On-balance sheet [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net |
62,760
|
60,035
|
| Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |
61,553
|
57,832
|
| Farmer Mac Guaranteed Securities: | On-balance sheet [Member] | Farm & Ranch [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net |
0
|
0
|
| Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |
0
|
0
|
| Farmer Mac Guaranteed Securities: | On-balance sheet [Member] | USDA Guarantees [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net |
31,360
|
27,620
|
| Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |
31,553
|
27,832
|
| Farmer Mac Guaranteed Securities: | On-balance sheet [Member] | Rural Utilities [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net |
0
|
0
|
| Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |
0
|
0
|
| Farmer Mac Guaranteed Securities: | On-balance sheet [Member] | Institutional Credit [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net |
31,400
|
32,415
|
| Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |
30,000
|
30,000
|
| Farmer Mac Guaranteed Securities: | On-balance sheet [Member] | Corporate Segment [Member] | Variable Interest Entity, Not Primary Beneficiary [Member] |
|
|
| Variable Interest Entity [Line Items] |
|
|
| Variable Interest Entity, Nonconsolidated, Carrying Amount, Assets and Liabilities, Net |
0
|
0
|
| Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount |
$ 0
|
$ 0
|