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Balance Sheet Offsetting (Tables) | 9 Months Ended
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Sep. 30, 2015
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Financial Instruments Eligible for Offset Consolidated Balance Sheet | Information about financial instruments that are eligible for offset in the consolidated balance sheet as of September 30, 2015 is presented in the following tables.
| Gross Amount Recognized |  | Gross Amount Offset |  | Net Amount Recognized
September 30, 2015 |  |  |  |  |
Financial assets: |  |  |  |  |
Derivatives: |  |  |  |  |
Loan/lease interest rate swaps and caps | $ | 893 |  |  | $ | — |  |  | $ | 893 |
Commodity swaps and options | 15,139 |  |  | — |  |  | 15,139 |
Foreign currency forward contracts | 4 |  |  | — |  |  | 4 |
Total derivatives | 16,036 |  |  | — |  |  | 16,036 |
Resell agreements | 13,642 |  |  | — |  |  | 13,642 |
Total | $ | 29,678 |  |  | $ | — |  |  | $ | 29,678 |
Financial liabilities: |  |  |  |  |
Derivatives: |  |  |  |  |
Loan/lease interest rate swaps | $ | 50,041 |  |  | $ | — |  |  | $ | 50,041 |
Commodity swaps and options | 2,231 |  |  | — |  |  | 2,231 |
Foreign currency forward contracts | 19 |  |  | — |  |  | 19 |
Total derivatives | 52,291 |  |  | — |  |  | 52,291 |
Repurchase agreements | 618,504 |  |  | — |  |  | 618,504 |
Total | $ | 670,795 |  |  | $ | — |  |  | $ | 670,795 |
Information about financial instruments that are eligible for offset in the consolidated balance sheet as of December 31, 2014 is presented in the following tables.
| Gross Amount Recognized |  | Gross Amount Offset |  | Net Amount Recognized
December 31, 2014 |  |  |  |  |
Financial assets: |  |  |  |  |
Derivatives: |  |  |  |  |
Loan/lease interest rate swaps and caps | $ | 2,191 |  |  | $ | — |  |  | $ | 2,191 |
Commodity swaps and options | 27,064 |  |  | — |  |  | 27,064 |
Foreign currency forward contracts | 666 |  |  | — |  |  | 666 |
Total derivatives | 29,921 |  |  | — |  |  | 29,921 |
Resell agreements | 9,642 |  |  | — |  |  | 9,642 |
Total | $ | 39,563 |  |  | $ | — |  |  | $ | 39,563 |
Financial liabilities: |  |  |  |  |
Derivatives: |  |  |  |  |
Loan/lease interest rate swaps | $ | 42,131 |  |  | $ | — |  |  | $ | 42,131 |
Commodity swaps and options | 5,765 |  |  | — |  |  | 5,765 |
Foreign currency forward contracts | 2 |  |  | — |  |  | 2 |
Total derivatives | 47,898 |  |  | — |  |  | 47,898 |
Repurchase agreements | 791,119 |  |  | — |  |  | 791,119 |
Total | $ | 839,017 |  |  | $ | — |  |  | $ | 839,017 |
Financial Instruments Derivative Assets Liabilities and Resell Agreements Net of Amount Not Offset |
|  |  | Gross Amounts Not Offset |  |
| Net Amount Recognized |  | Financial Instruments |  | Collateral |  | Net Amount
September 30, 2015 |  |  |  |  |  |  |
Financial assets: |  |  |  |  |  |  |
Derivatives: |  |  |  |  |  |  |
Counterparty A | $ | 593 |  |  | $ | (593 | ) |  | $ | — |  |  | $ | — |
Counterparty B | 10,048 |  |  | (8,383 | ) |  | (1,196 | ) |  | 469 |
Counterparty C | 3,925 |  |  | (3,925 | ) |  | — |  |  | — |
Other counterparties | 1,470 |  |  | (1,239 | ) |  | (230 | ) |  | 1 |
Total derivatives | 16,036 |  |  | (14,140 | ) |  | (1,426 | ) |  | 470 |
Resell agreements | 13,642 |  |  | — |  |  | (13,642 | ) |  | — |
Total | $ | 29,678 |  |  | $ | (14,140 | ) |  | $ | (15,068 | ) |  | $ | 470 |
Financial liabilities: |  |  |  |  |  |  |
Derivatives: |  |  |  |  |  |  |
Counterparty A | $ | 19,368 |  |  | $ | (593 | ) |  | $ | (18,611 | ) |  | $ | 164 |
Counterparty B | 8,383 |  |  | (8,383 | ) |  | — |  |  | — |
Counterparty C | 4,522 |  |  | (3,925 | ) |  | (597 | ) |  | — |
Other counterparties | 20,018 |  |  | (1,239 | ) |  | (17,936 | ) |  | 843 |
Total derivatives | 52,291 |  |  | (14,140 | ) |  | (37,144 | ) |  | 1,007 |
Repurchase agreements | 618,504 |  |  | — |  |  | (618,504 | ) |  | — |
Total | $ | 670,795 |  |  | $ | (14,140 | ) |  | $ | (655,648 | ) |  | $ | 1,007 |
|  |  | Gross Amounts Not Offset |  |
| Net Amount Recognized |  | Financial Instruments |  | Collateral |  | Net Amount
December 31, 2014 |  |  |  |  |  |  |
Financial assets: |  |  |  |  |  |  |
Derivatives: |  |  |  |  |  |  |
Counterparty A | $ | 627 |  |  | $ | (627 | ) |  | $ | — |  |  | $ | — |
Counterparty B | 17,308 |  |  | (9,506 | ) |  | (4,925 | ) |  | 2,877 |
Counterparty C | 7,991 |  |  | (7,539 | ) |  | — |  |  | 452 |
Other counterparties | 3,995 |  |  | (2,764 | ) |  | (1,110 | ) |  | 121 |
Total derivatives | 29,921 |  |  | (20,436 | ) |  | (6,035 | ) |  | 3,450 |
Resell agreements | 9,642 |  |  | — |  |  | (9,642 | ) |  | — |
Total | $ | 39,563 |  |  | $ | (20,436 | ) |  | $ | (15,677 | ) |  | $ | 3,450 |
Financial liabilities: |  |  |  |  |  |  |
Derivatives: |  |  |  |  |  |  |
Counterparty A | $ | 18,653 |  |  | $ | (627 | ) |  | $ | (17,626 | ) |  | $ | 400 |
Counterparty B | 9,506 |  |  | (9,506 | ) |  | — |  |  | — |
Counterparty C | 7,539 |  |  | (7,539 | ) |  | — |  |  | — |
Other counterparties | 12,200 |  |  | (2,764 | ) |  | (8,681 | ) |  | 755 |
Total derivatives | 47,898 |  |  | (20,436 | ) |  | (26,307 | ) |  | 1,155 |
Repurchase agreements | 791,119 |  |  | — |  |  | (791,119 | ) |  | — |
Total | $ | 839,017 |  |  | $ | (20,436 | ) |  | $ | (817,426 | ) |  | $ | 1,155 |
Remaining Contractual Maturity of the Securities Sold Under Agreement [Table Text Block] | The remaining contractual maturity of repurchase agreements in the consolidated balance sheets as of September 30, 2015 and December 31, 2014 is presented in the following tables.
| Remaining Contractual Maturity of the Agreements
| Overnight and Continuous |  | Up to 30 Days |  | 30-90 Days |  | Greater than 90 Days |  | Total
September 30, 2015 |  |  |  |  |  |  |  |  |
Repurchase agreements: |  |  |  |  |  |  |  |  |
U.S. Treasury | $ | 523,128 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 523,128 |
Residential mortgage-backed securities | 86,999 |  |  | — |  |  | 8,377 |  |  | — |  |  | 95,376 |
Total borrowings | $ | 610,127 |  |  | $ | — |  |  | $ | 8,377 |  |  | $ | — |  |  | $ | 618,504 |
Gross amount of recognized liabilities for repurchase agreements |  | $ | 618,504 |
Amounts related to agreements not included in offsetting disclosures above |  | $ | — |
December 31, 2014 |  |  |  |  |  |  |  |  |
Repurchase agreements: |  |  |  |  |  |  |  |  |
U.S. Treasury | $ | 427,402 |  |  | $ | — |  |  | $ | — |  |  | $ | — |  |  | $ | 427,402 |
Residential mortgage-backed securities | 355,187 |  |  | — |  |  | 8,530 |  |  | — |  |  | 363,717 |
Total borrowings | $ | 782,589 |  |  | $ | — |  |  | $ | 8,530 |  |  | $ | — |  |  | $ | 791,119 |
Gross amount of recognized liabilities for repurchase agreements |  | $ | 791,119 |
Amounts related to agreements not included in offsetting disclosures above |  | $ | — |

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