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Derivatives (Tables) | 12 Months Ended
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Dec. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract] |
Schedule of notional and fair values of derivatives | The following table presents the total notional and fair value of the Company’s derivatives as of December 31, 2017 and 2016:
($ in thousands) |  | December 31, 2017 |  | December 31, 2016
| Notional Amount |  | Fair Value |  | Notional Amount |  | Fair Value
|  | Derivative Assets (1) |  | Derivative Liabilities (1) |  |  | Derivative Assets (1) |  | Derivative Liabilities (1)
Derivatives designated as hedging instruments: |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps on certificates of deposit |  | $ | 35,811 |  |  | $ | — |  |  | $ | 6,799 |  |  | $ | 48,365 |  |  | $ | — |  |  | $ | 5,976 |
Foreign currency forward contracts |  | — |  |  | — |  |  | — |  |  | 83,026 |  |  | 4,325 |  |  | — |
Total derivatives designated as hedging instruments |  | $ | 35,811 |  |  | $ | — |  |  | $ | 6,799 |  |  | $ | 131,391 |  |  | $ | 4,325 |  |  | $ | 5,976 |
Derivatives not designated as hedging instruments: |  |  |  |  |  |  |  |  |  |  |  |
Interest rate swaps and options |  | $ | 9,333,860 |  |  | $ | 58,633 |  |  | $ | 57,958 |  |  | $ | 7,668,482 |  |  | $ | 67,578 |  |  | $ | 65,131 |
Foreign exchange contracts |  | 770,215 |  |  | 5,840 |  |  | 10,170 |  |  | 767,764 |  |  | 11,874 |  |  | 11,213 |
RPAs |  | 49,033 |  |  | 1 |  |  | 8 |  |  | 71,414 |  |  | 3 |  |  | 3 |
Warrants |  | — |  | (2) | 1,672 |  |  | — |  |  | — |  |  | — |  |  | — |
Total derivatives not designated as hedging instruments |  | $ | 10,153,108 |  |  | $ | 66,146 |  |  | $ | 68,136 |  |  | $ | 8,507,660 |  |  | $ | 79,455 |  |  | $ | 76,347 |
(1) | Derivative assets and derivative liabilities are included in Other assets and Accrued expenses and other liabilities, respectively, on the Consolidated Balance Sheet.
(2) | The Company held four warrants in public companies and 23 warrants in private companies as of December 31, 2017.
Schedule of net gains (losses) recognized on the Consolidated Statements of Income related to derivatives designated as fair value hedge | The following table presents the net (losses) gains recognized on the Consolidated Statement of Income related to the derivatives designated as fair value hedges for the years ended December 31, 2017, 2016 and 2015:
($ in thousands) |  | Year Ended December 31,
| 2017 |  | 2016 |  | 2015
(Losses) gains recorded in interest expense: |  |  |  |  |  |
Recognized on interest rate swaps |  | $ | (2,734 | ) |  | $ | (794 | ) |  | $ | 3,452 |
Recognized on certificates of deposit |  | $ | 2,271 |  |  | $ | 157 |  |  | $ | (3,190 | )
Schedule of gains (losses) related to net investment hedges in accumulated other comprehensive income (loss) and Consolidated Statements of Income | The following table presents the (losses) gains recorded in the Foreign currency translation adjustment account within AOCI related to the effective portion of the net investment hedges and the ineffective portion recorded on the Consolidated Statement of Income for the years ended December 31, 2017, 2016 and 2015:
($ in thousands) |  | Year Ended December 31,
| 2017 |  | 2016 |  | 2015
(Losses) gains recognized in AOCI on net investment hedges (effective portion) |  | $ | (648 | ) |  | $ | 2,908 |  |  | $ | 1,485 |
(Losses) gains recognized in foreign exchange income (ineffective portion) |  | $ | (1,953 | ) |  | $ | 1,124 |  |  | $ | 880 |
Schedule of net gains (losses) recognized on the Consolidated Statements of Income related to derivatives not designated as hedging instruments | The following table presents the net gains (losses) recognized on the Company’s Consolidated Statement of Income related to derivatives not designated as hedging instruments for the years ended December 31, 2017, 2016 and 2015:
($ in thousands) |  | Location in Consolidated Statement of Income |  | Year Ended December 31,
|  | 2017 |  | 2016 |  | 2015
Derivatives not designated as hedging instruments: |  |  |  |  |  |  |  |
Interest rate swaps and options |  | Derivative fees and other income |  | $ | (1,772 | ) |  | $ | 2,557 |  |  | $ | 65 |
Foreign exchange contracts |  | Foreign exchange income |  | 22,076 |  |  | 12,632 |  |  | 4,235 |
Foreign exchange options |  | Foreign exchange income |  | — |  |  | — |  |  | 236 |
RPAs |  | Derivative fees and other income |  | (7 | ) |  | — |  |  | — |
Warrants |  | Ancillary loan fees and other income |  | 1,672 |  |  | — |  |  | — |
Embedded derivative liabilities |  | Other operating expense |  | — |  |  | — |  |  | (136 | )
Total net gains |  |  |  | $ | 21,969 |  |  | $ | 15,189 |  |  | $ | 4,400 |
Schedule of gross derivatives on the Consolidated Balance Sheets and the respective collateral received or pledged in the form of other financial instruments | The following tables present gross derivatives on the Consolidated Balance Sheet and the respective collateral received or pledged in the form of other financial instruments, which are generally marketable securities and/or cash. The collateral amounts in these tables are limited to the outstanding balances of the related asset or liability (after netting is applied); thus instances of overcollateralization are not shown:
($ in thousands) |  | As of December 31, 2017
|  | Total |  | Contracts Not Subject to Master Netting Arrangements |  | Contracts Subject to Master Netting Arrangements
| Gross Amounts Recognized |  | Gross Amounts Recognized |  | Gross Amounts Recognized |  | Gross Amounts Offset on the Consolidated Balance Sheet |  | Net Amounts Presented on the Consolidated Balance Sheet |  | Gross Amounts Not Offset on the Consolidated Balance Sheet |  | Net Amount
|  |  |  |  |  | Derivative Amounts |  | Collateral Received |
Derivative assets |  | $ | 66,146 |  |  | $ | 36,941 |  |  | $ | 29,205 |  |  | $ | — |  |  | $ | 29,205 |  |  | $ | (18,955 | ) | (1) | $ | (9,839 | ) | (2) | $ | 411 |
|  | Gross Amounts Recognized |  | Gross Amounts Recognized |  | Gross Amounts Recognized |  | Gross Amounts Offset on the Consolidated Balance Sheet |  | Net Amounts Presented on the Consolidated Balance Sheet |  | Gross Amounts Not Offset on the Consolidated Balance Sheet |  | Net Amount
|  |  |  |  |  | Derivative Amounts |  | Collateral Posted |
Derivative liabilities |  | $ | 74,935 |  |  | $ | 26,732 |  |  | $ | 48,203 |  |  | $ | — |  |  | $ | 48,203 |  |  | $ | (18,955 | ) | (1) | $ | (28,796 | ) | (3) | $ | 452 |
($ in thousands) |  | As of December 31, 2016
|  | Total |  | Contracts Not Subject to Master Netting Arrangements |  | Contracts Subject to Master Netting Arrangements
| Gross Amounts Recognized |  | Gross Amounts Recognized |  | Gross Amounts Recognized |  | Gross Amounts Offset on the Consolidated Balance Sheet |  | Net Amounts Presented on the Consolidated Balance Sheet |  | Gross Amounts Not Offset on the Consolidated Balance Sheet |  | Net Amount
|  |  |  |  |  | Derivative Amounts |  | Collateral Received |
Derivative assets |  | $ | 83,780 |  |  | $ | 51,218 |  |  | $ | 32,562 |  |  | $ | — |  |  | $ | 32,562 |  |  | $ | (20,991 | ) | (1) | $ | (10,687 | ) | (2) | $ | 884 |
|  | Gross Amounts Recognized |  | Gross Amounts Recognized |  | Gross Amounts Recognized |  | Gross Amounts Offset on the Consolidated Balance Sheet |  | Net Amounts Presented on the Consolidated Balance Sheet |  | Gross Amounts Not Offset on the Consolidated Balance Sheet |  | Net Amount
|  |  |  |  |  | Derivative Amounts |  | Collateral Received |
Derivative liabilities |  | $ | 82,323 |  |  | $ | 24,097 |  |  | $ | 58,226 |  |  | $ | — |  |  | $ | 58,226 |  |  | $ | (20,991 | ) | (1) | $ | (36,349 | ) | (3) | $ | 886 |
(1) | Represents the netting of derivative receivable and payable balances for the same counterparty under enforceable master netting arrangements if the Company has elected to net.
(2) | Represents cash and securities received against derivative assets with the same counterparty that are subject to enforceable master netting arrangements, including $8.6 million and $8.1 million of cash collateral received as of December 31, 2017 and 2016, respectively.
(3) | Represents cash and securities pledged against derivative liabilities with the same counterparty that are subject to enforceable master netting arrangements, including $10.7 million and $170 thousand of cash collateral posted as of December 31, 2017 and 2016, respectively.

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- Definition Tabular disclosure of the location and amount of derivative instruments and nonderivative instruments designated as hedging instruments reported before netting adjustments, and the amount of gain (loss) on derivative instruments and nonderivative instruments designated and qualified as hedging instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5618551-113959 + Details
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- Definition Tabular disclosure of pertinent information about a derivative or group of derivatives on a disaggregated basis, such as for individual instruments, or small groups of similar instruments. May include a combination of the type of instrument, risks being hedged, notional amount, hedge designation, related hedged item, inception date, maturity date, or other relevant item. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=84234895&loc=d3e41641-113959 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624163-113959 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=84234895&loc=d3e41678-113959 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=84234895&loc=d3e41638-113959 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5580258-113959 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579245-113959 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4C -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5624171-113959 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=84234895&loc=SL5579240-113959 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=84234895&loc=d3e41620-113959 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 235 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.4-08.(n)(2)) -URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690 + Details
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