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Derivative Financial Instruments (Details) - USD ($) $ in Thousands | Sep. 30, 2018 | Dec. 31, 2017
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Risk Management [Member] |  |
Summary of Derivative Instruments [Abstract] |  |
Notional Amount | $ 0 | $ 0
Derivative, Fair Value, Net | 0 | 0
Non-designated hedging instruments | Client-Related | Interest rate swap contracts |  |
Summary of Derivative Instruments [Abstract] |  |
Notional Amount | 433,664 | 394,852
Non-designated hedging instruments | Client-Related | Foreign Exchange Forward [Member] |  |
Summary of Derivative Instruments [Abstract] |  |
Notional Amount | 123 | 1,528
Non-designated hedging instruments | Client-Related | Other Assets | Interest rate swap contracts |  |
Summary of Derivative Instruments [Abstract] |  |
Asset derivatives (other assets), fair value | 4,772 | 2,061
Non-designated hedging instruments | Client-Related | Other Assets | Foreign Exchange Forward [Member] |  |
Summary of Derivative Instruments [Abstract] |  |
Asset derivatives (other assets), fair value | 123 | 1,528
Non-designated hedging instruments | Client-Related | Other Liabilities | Interest rate swap contracts |  |
Summary of Derivative Instruments [Abstract] |  |
Liability derivatives (other liabilities), fair value | 4,772 | 2,061
Non-designated hedging instruments | Client-Related | Other Liabilities | Foreign Exchange Forward [Member] |  |
Summary of Derivative Instruments [Abstract] |  |
Liability derivatives (other liabilities), fair value | $ 123 | $ 1,528

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- Definition Aggregate notional amount specified by the derivative(s). Expressed as an absolute value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Article 12 -Section 13 -Sentence Column B + Details
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- Definition Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -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 815 -SubTopic 10 -Section 50 -Paragraph 4B -Subparagraph (a),(c) -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 210 -SubTopic 20 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82849420&loc=SL20226000-175313 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 860 -SubTopic 20 -Section 50 -Paragraph 4D -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=82924980&loc=SL51823488-111719 + Details
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