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Asset & Liability Derivative Positions & the Potential Effect of Netting Arrangements - Current Quarter (Tables) | 6 Months Ended
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Jun. 30, 2018
Offsetting [Abstract] |
Offsetting Assets [Table Text Block] | The following tables present the Company's asset and liability derivative positions and the potential effect of netting arrangements on its financial position, as of the periods indicated:
|  |  |  | Gross Amounts Not Offset in the Statement of Financial Position |
| Gross Amounts Recognized in the Statement of Financial Position | Gross Amounts Offset in the Statement of Financial Position | Net Amounts Presented in the Statement of Financial Position | Financial Instruments (1) | Collateral Pledged (Received) | Net Amount
| June 30, 2018
| (Dollars in thousands)
Derivative Assets |
Interest rate swaps | $ | 3,394 |  | $ | — |  | $ | 3,394 |  | $ | 1,455 |  | $ | (1,227 | ) | $ | 712 |
Loan level derivatives | 21,861 |  | — |  | 21,861 |  | 2,171 |  | (10,123 | ) | 9,567 |
Customer foreign exchange contracts | 1,137 |  | — |  | 1,137 |  | — |  | — |  | 1,137 |
| $ | 26,392 |  | $ | — |  | $ | 26,392 |  | $ | 3,626 |  | $ | (11,350 | ) | $ | 11,416 |
Derivative Liabilities |
Interest rate swaps | $ | 1,516 |  | $ | — |  | $ | 1,516 |  | $ | 1,455 |  | $ | 61 |  | $ | — |
Loan level derivatives | 21,872 |  | — |  | 21,872 |  | 2,171 |  | 32 |  | 19,669 |
Customer foreign exchange contracts | 1,111 |  | — |  | 1,111 |  | — |  | — |  | 1,111 |
| $ | 24,499 |  | $ | — |  | $ | 24,499 |  | $ | 3,626 |  | $ | 93 |  | $ | 20,780 |
Customer repurchase agreements | 142,235 |  | — |  | 142,235 |  | — |  | 142,235 |  | — |
(1) | Reflects offsetting derivative positions with the same counterparty.
|  |  |  | Gross Amounts Not Offset in the Statement of Financial Position |
| Gross Amounts Recognized in the Statement of Financial Position | Gross Amounts Offset in the Statement of Financial Position | Net Amounts Presented in the Statement of Financial Position | Financial Instruments (1) | Collateral Pledged (Received) | Net Amount
| December 31, 2017
| (Dollars in thousands)
Derivative Assets |
Interest rate swaps | $ | 1,880 |  | $ | — |  | $ | 1,880 |  | $ | 805 |  | $ | — |  | $ | 1,075 |
Loan level derivatives | 14,236 |  | — |  | 14,236 |  | 4,578 |  | — |  | 9,658 |
Customer foreign exchange contracts | 1,202 |  | — |  | 1,202 |  | — |  | — |  | 1,202 |
| $ | 17,318 |  | $ | — |  | $ | 17,318 |  | $ | 5,383 |  | $ | — |  | $ | 11,935 |
Derivative Liabilities |
Interest rate swaps | $ | 264 |  | $ | — |  | $ | 264 |  | $ | — |  | $ | 264 |  | $ | — |
Loan level derivatives | 14,241 |  | — |  | 14,241 |  | 5,383 |  | 3,675 |  | 5,183 |
Customer foreign exchange contracts | 1,188 |  | — |  | 1,188 |  | — |  | — |  | 1,188 |
| $ | 15,693 |  | $ | — |  | $ | 15,693 |  | $ | 5,383 |  | $ | 3,939 |  | $ | 6,371 |
Customer repurchase agreements | 162,679 |  | — |  | 162,679 |  | — |  | 162,679 |  | — |
(1) | Reflects offsetting derivative positions with the same counterparty.

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- Definition Tabular disclosure of derivative and other financial assets that are subject to offsetting, including master netting arrangements. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225862-175312 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=51824906&loc=SL20225877-175312 + Details
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