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Derivatives (Tables) | 12 Months Ended
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Dec. 31, 2017
Derivatives [Abstract] |
Fair Values of Derivative Financial Instruments | ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  | Fair Values (1)
﻿ |  |  |  | Notional Amounts |  | Assets |  | Liabilities
﻿ |  | Type of |  | December 31, |  | December 31, |  | December 31,
﻿(in thousands) |  | Hedge |  | 2017 |  | 2016 |  | 2017 |  | 2016 |  | 2017 |  | 2016
﻿Derivatives designated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿as hedging instruments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Interest rate swaps |  | Cash Flow |  | $ | 875,000 |  | $ | 1,100,000 |  | $ | — |  | $ | — |  | $ | 14,020 |  | $ | 7,787
﻿Interest rate swaps |  | Fair Value |  |  | 483,110 |  |  | — |  |  | — |  |  | — |  |  | 2,475 |  |  | —
﻿ |  |  |  | $ | 1,358,110 |  | $ | 1,100,000 |  | $ | — |  | $ | — |  | $ | 16,495 |  | $ | 7,787
﻿Derivatives not designated |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿as hedging instruments: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿Interest rate swaps (2) |  | N/A |  | $ | 1,144,789 |  | $ | 979,391 |  | $ | 15,408 |  | $ | 18,405 |  | $ | 15,857 |  | $ | 18,362
﻿Risk participation agreements |  | N/A |  |  | 119,951 |  |  | 84,732 |  |  | 23 |  |  | 50 |  |  | 109 |  |  | 105
﻿Forward commitments to sell |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿residential mortgage loans |  | N/A |  |  | 80,462 |  |  | 75,676 |  |  | 1,000 |  |  | 900 |  |  | 290 |  |  | 221
﻿Interest rate-lock commitments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿on residential mortgage loans |  | N/A |  |  | 53,724 |  |  | 46,840 |  |  | 186 |  |  | 189 |  |  | 782 |  |  | 228
﻿Foreign exchange forward |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿contracts |  | N/A |  |  | 42,260 |  |  | 56,152 |  |  | 2,453 |  |  | 771 |  |  | 2,419 |  |  | 729
﻿ |  |  |  | $ | 1,441,186 |  | $ | 1,242,791 |  | $ | 19,070 |  | $ | 20,315 |  | $ | 19,457 |  | $ | 19,645
﻿Total derivatives |  |  |  | $ | 2,799,296 |  | $ | 2,342,791 |  | $ | 19,070 |  | $ | 20,315 |  | $ | 35,952 |  | $ | 27,432
﻿Less: netting adjustments (3) |  |  |  |  |  |  |  |  |  |  | (4,913) |  |  | — |  |  | (21,563) |  |  | —
﻿Total derivate assets/liabi lities |  |  |  |  |  |  |  |  |  |  | 14,157 |  |  | 20,315 |  |  | 14,389 |  |  | 27,432
﻿
| (1) |  | Derivative assets and liabilities are reported with other assets or other liabilities, respectively, in the consolidated balance sheets.
| (2) |  | The notional amount represents both the customer accommodation agreements and offsetting agreements with unrelated financial institutions.
| (3) |  | Represents balance sheet netting of derivative assets and liabilities for variation margin collateral held or placed with the same central clearing counterparty. See offsetting assets and liabilities for further information.
Offsetting Derivative Assets and Liabilities Subject to Master Netting Arrangements |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿As of December 31, 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  | Gross Amounts Offset in the |  | Net Amounts Presented in the |  | Gross Amounts Not Offset in the Statement of Financial Position
﻿(in thousands) |  | Gross Amounts Recognized |  | Statement of Financial Position |  | Statement of Financial Position |  | Financial Instruments |  | Cash Collateral |  | Net Amount
﻿Derivative Assets |  | $ | 7,155 |  | $ | (5,007) |  | $ | 2,148 |  | $ | 2,148 |  | $ | — |  | $ | —
﻿Derivative Liabilities |  | $ | 24,015 |  | $ | (20,077) |  | $ | 3,938 |  | $ | 2,148 |  | $ | 4,099 |  | $ | (2,309)
﻿ ﻿
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿As of December 31, 2016 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
﻿ |  |  |  |  | Gross Amounts Offset in the |  | Net Amounts Presented in the |  | Gross Amounts Not Offset in the Statement of Financial Position
﻿(in thousands) |  | Gross Amounts Recognized |  | Statement of Financial Position |  | Statement of Financial Position |  | Financial Instruments |  | Cash Collateral |  | Net Amount
﻿Derivative Assets |  | $ | 4,788 |  | $ | — |  | $ | 4,788 |  | $ | 4,788 |  | $ | — |  | $ | —
﻿Derivative Liabilities |  | $ | 26,846 |  | $ | — |  | $ | 26,846 |  | $ | 4,788 |  | $ | 19,095 |  | $ | 2,963
﻿

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- Definition Tabular disclosure of the location and fair value amounts of derivative instruments (and nonderivative instruments that are designated and qualify as hedging instruments) reported in the statement of financial position. + References Reference 1: 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=64837297&loc=SL5624163-113959 + Details
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