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Derivatives and Hedging Activities (FV of Derivative Financial Instruments and Classification on Balance Sheet) (Details) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | $ 19,872 | $ 22,331
Liability Derivatives | 164,797 | 198,596
Other Assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Instruments Not Designated as Hedging Instruments, Asset, at Fair Value | 18,683 | 21,397
Derivative Asset, Fair Value, Gross Asset | 20,119 | 22,761
Other Liabilities [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Instruments Not Designated as Hedging Instruments, Liability, at Fair Value | 18,425 | 21,176
Liability Derivatives | 19,025 | 21,916
Interest rate swaps [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset |  | 1,364
Liability Derivatives |  | 740
Interest rate swaps [Member] | Derivatives designated as hedges [Member] | Other Assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Interest Rate Derivative Assets, at Fair Value | 1,436 | 1,364
Interest rate swaps [Member] | Derivatives designated as hedges [Member] | Other Liabilities [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Interest Rate Derivative Liabilities, at Fair Value | 600 | 740
Loan level swaps [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset |  | 18,629
Liability Derivatives |  | 18,632
Loan level swaps [Member] | Other Assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 16,697 | 18,629
Loan level swaps [Member] | Other Liabilities [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Liability Derivatives | 16,706 | 18,632
Foreign exchange contracts |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset |  | 2,338
Liability Derivatives |  | 2,311
Foreign exchange contracts | Other Assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Asset, Fair Value, Gross Asset | 1,739 | 2,338
Foreign exchange contracts | Other Liabilities [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Liability Derivatives | 1,719 | 2,311
Interest Rate Lock Commitments [Member] | Not Designated as Hedging Instrument | Other Assets [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Instrument Not Designated as a Hedge, Interest Rate Lock Commitments, Asset at Fair Value | 212 | 430
Derivative Instrument Not Designated as a Hedge, Forward Sales Agreements, Asset at Fair Value | 35 | 0
Interest Rate Lock Commitments [Member] | Not Designated as Hedging Instrument | Other Liabilities [Member] |  |
Derivatives, Fair Value [Line Items] |  |
Derivative Instrument Not Designated as a Hedge, Interest Rate Lock Commitments, Liabilities at Fair Value | 0 | 0
Derivative Instrument Not Designated as a Hedge, Forward Sales Agreements, Liabilities at Fair Value | $ 0 | $ 233

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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=64837297&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=51825145&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=64830801&loc=SL51823488-111719 + Details
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