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Fair Value Measurements (Assets Measured At Fair Value On A Recurring And Nonrecurring Basis) (Details) - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Assets measured at fair value on a recurring basis [Abstract]
Fair value	$ 1,196,956	$ 1,248,614
Assets measured on a nonrecurring basis [Abstract]
Impaired loans - collateral dependent	5,800
Fair Value, Measurements, Recurring [Member]
Assets measured at fair value on a recurring basis [Abstract]
U.S. Government agency securities	35,225	27,702
Asset-backed securities	264,939	355,396
Obligations of states and political subdivisions	86,432	94,533
Residential mortgage-backed securities	364,437	342,569
Collaterized mortgage obligation securities	129,093	159,823
Commercial mortgage-backed securities	153,648	117,086
Foreign debt securities	59,995	56,497
Corporate debt securities	103,187	95,008
Fair value	1,196,956	1,248,614
Loans held for sale	380,272	663,140
Investment in unconsolidated entity, senior note	103,950	118,389
Investment in unconsolidated entity, subordinated note	3,761	8,541
Interest rate swaps, asset	722	3,207
Total assets	1,685,661	2,041,891
Fair Value, Measurements, Nonrecurring [Member]
Assets measured on a nonrecurring basis [Abstract]
Impaired loans - collateral dependent	4,011	3,685
Other real estate owned		104
Intangible assets	5,185	6,906
Assets nonrecurring	9,196	10,695
Significant Other Observable Inputs (Level 2) [Member]
Assets measured at fair value on a recurring basis [Abstract]
Fair value	1,153,403	1,248,614
Interest rate swaps, asset	722	3,207
Significant Other Observable Inputs (Level 2) [Member] | Fair Value, Measurements, Recurring [Member]
Assets measured at fair value on a recurring basis [Abstract]
U.S. Government agency securities	35,225	27,702
Asset-backed securities	264,939	355,396
Obligations of states and political subdivisions	86,432	94,533
Residential mortgage-backed securities	364,437	342,569
Collaterized mortgage obligation securities	129,093	159,823
Commercial mortgage-backed securities	110,095	117,086
Foreign debt securities	59,995	56,497
Corporate debt securities	103,187	95,008
Fair value	1,153,403	1,248,614
Interest rate swaps, asset	722	3,207
Total assets	1,154,125	1,251,821
Significant Unobservable Inputs (Level 3) [Member]
Assets measured at fair value on a recurring basis [Abstract]
Fair value	43,553
Loans held for sale	380,272	663,140
Investment in unconsolidated entity, senior note	103,950	118,389
Investment in unconsolidated entity, subordinated note	3,761	8,541
Assets held for sale	314,994	360,711
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Recurring [Member]
Assets measured at fair value on a recurring basis [Abstract]
Commercial mortgage-backed securities	43,553
Fair value	43,553
Loans held for sale	380,272	663,140
Investment in unconsolidated entity, senior note	103,950	118,389
Investment in unconsolidated entity, subordinated note	3,761	8,541
Total assets	531,536	790,070
Significant Unobservable Inputs (Level 3) [Member] | Fair Value, Measurements, Nonrecurring [Member]
Assets measured on a nonrecurring basis [Abstract]
Impaired loans - collateral dependent	4,011	3,685
Other real estate owned		104
Intangible assets	5,185	6,906
Assets nonrecurring	$ 9,196	$ 10,695

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- Definition

Asset-backed Securities, Fair Value Disclosure

+ References

No definition available.

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- Definition

This element represents the aggregate fair value of assets measured on a nonrecurring basis as of the balance sheet date.

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- Definition

Collateralized Mortgage Obligation Securities, Fair Value Disclosure

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No definition available.

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents securitized, pay-through debt securities collateralized by commercial mortgage loans (mortgages) as of the balance sheet date.

+ References

No definition available.

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- Definition

Corporate Debt Securities, Fair Value Disclosure

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- Definition

Foreign Debt Securities Fair Value Disclosure

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This element represents the fair value of impaired loans.

+ References

No definition available.

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- Definition

InterestRateSwaps

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- Definition

Investment In Unconsolidated Entity, Senior Note, Fair Value Disclosure

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No definition available.

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Investment In Unconsolidated Entity, Subordinate Note, Fair Value Disclosure

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. Bonds or similar securities issued by state, city, or local US governments or the agencies operated by state, city, or local governments., which have been categorized as available-for-sale.

+ References

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- Definition

Other Real Estate Owned, Fair Value Disclosure

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No definition available.

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents securitized, pay-through debt securities collateralized by residential mortgage loans (mortgages) as of the balance sheet date.

+ References

No definition available.

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- Definition

This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. Government Agencies Debentures, notes and other debt securities issued by US government agencies, for example but not limited to, Government National Mortgage Association (GNMA or Ginnie Mae) which have been categorized as available-for-sale. Excludes US treasury Securities. Government Sponsored Entities (GESs) Debentures, bonds and other debt securities issued by US government sponsored entities, for example, but not limited to, Federal Home Loan Mortgage Corporation (FHLMC or Freddie Mac), Federal National Mortgage Association (FNMA or Fannie Mae), and the Federal Home Loan Bank (FHLB) which have been categorized as available-for-sale.

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- Definition

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

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- Definition

Fair value portion of assets classified as held for sale.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258

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Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 25
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=75030427&loc=d3e22054-111558

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 5
-Subparagraph (aa)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27232-111563

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=82896770&loc=d3e26610-111562

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- Definition

Fair value portion of assets, excluding financial assets, that lack physical substance, having a limited useful life.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19190-110258

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- Definition

Fair value portion of loans held-for-sale including, but not limited to, mortgage loans and finance receivables.

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