Related Party Transactions - Other Related Party Transactions (Details) - USD ($)
$ in Millions |
12 Months Ended |
Dec. 31, 2015 |
Dec. 31, 2014 |
Dec. 31, 2013 |
| AgFirst Farm Credit Bank [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Accounts Receivable, Related Parties, Current |
$ 0.1
|
$ 0.1
|
|
| Revenue from Related Parties |
0.4
|
0.6
|
$ 0.7
|
| First Dakota Bank [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Related Party Transaction, Expenses from Transactions with Related Party |
1.0
|
0.8
|
0.6
|
| AgGeorgia [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Revenue from Related Parties |
0.1
|
0.1
|
0.1
|
| Mortgage Loans on Real Estate [Member] | Farm & Ranch [Member] | First Dakota Bank [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Related Party Transaction, Purchases from Related Party |
21.1
|
35.1
|
61.6
|
| Guarantee Obligations [Member] | AgFirst Farm Credit Bank [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Related Party Transaction, Purchases from Related Party |
28.5
|
19.7
|
8.1
|
| Guarantee Obligations [Member] | First Dakota Bank [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Related Party Transaction, Purchases from Related Party |
7.8
|
0.0
|
1.0
|
| Guarantee Obligations [Member] | AgGeorgia [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Related Party Transaction, Purchases from Related Party |
|
20.2
|
27.5
|
| USDA Securities [Member] | USDA Guarantee [Member] | Bath State Bank [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Related Party Transaction, Purchases from Related Party |
2.1
|
4.5
|
$ 9.3
|
| Floating Interest Rate [Member] | GSE Subordinated Debt [Member} | CoBank, ACB [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Notes Receivable, Related Parties |
$ 70.0
|
$ 70.0
|
|
| Common Class B, Voting [Member] | AgFirst Farm Credit Bank [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Common Stock Ownership Percentage by a Related Party |
16.80%
|
|
|
| Common Class B, Voting [Member] | CoBank, ACB [Member] |
|
|
|
| Related Party Transaction [Line Items] |
|
|
|
| Common Stock Ownership Percentage by a Related Party |
32.60%
|
|
|