Derivative Financial Instruments Notional Amounts and Fair Values of Derivative Financial Instruments (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Foreign Currency Open Position	$ 500,000
Derivative, Fair Value, Net	5,049	6,281
Interest Rate Lock Commitments [Member]
Asset (Liability) Fair Value	4,219	6,757
Interest Rate Lock Commitments [Member] \| Positive Fair Values [Member]
Notional Amount	232,548	314,416
Asset, Fair Value	4,412	6,912
Interest Rate Lock Commitments [Member] \| Negative Fair Values [Member]
Notional Amount	16,306	9,714
Liability, Fair Value	(193)	(155)
Forward Commitments [Member]
Asset (Liability) Fair Value	220	(208)
Forward Commitments [Member] \| Positive Fair Values [Member]
Notional Amount	14,792	79,152
Asset, Fair Value	396	707
Forward Commitments [Member] \| Negative Fair Values [Member]
Notional Amount	229,351	236,500
Liability, Fair Value	(176)	(915)
InterestRateSwapWithCustomer [Domain] \| Positive Fair Values [Member]
Notional Amount	146,789	130,841
Asset, Fair Value	6,682	7,090
InterestRateSwapWithCounterparty [Domain] \| Negative Fair Values [Member]
Notional Amount	146,789	130,841
Liability, Fair Value	(6,682)	(7,090)
ForeignCurrencyForwardWithCustomer [Domain]
Foreign Currency Derivatives at Fair Value, Net	249	(211)
ForeignCurrencyForwardWithCustomer [Domain] \| Positive Fair Values [Member]
Notional Amount of Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	17,645	1,941
Foreign Currency Contract, Asset, Fair Value Disclosure	399	137
ForeignCurrencyForwardWithCustomer [Domain] \| Negative Fair Values [Member]
Notional Amount of Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	9,626	10,199
Foreign Currency Contracts, Liability, Fair Value Disclosure	(150)	(348)
ForeignCurrencyForwardWithCorrespondentBanks [Domain]
Foreign Currency Derivatives at Fair Value, Net	361	(57)
ForeignCurrencyForwardWithCorrespondentBanks [Domain] \| Positive Fair Values [Member]
Notional Amount of Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	42,386	60,106
Foreign Currency Contract, Asset, Fair Value Disclosure	1,422	1,064
ForeignCurrencyForwardWithCorrespondentBanks [Domain] \| Negative Fair Values [Member]
Notional Amount of Foreign Currency Derivative Instruments Not Designated as Hedging Instruments	32,907	37,557
Foreign Currency Contracts, Liability, Fair Value Disclosure	$ (1,061)	$ (1,121)

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- Definition

Fair value of the assets less the liabilities of a derivative or group of derivatives.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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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 contracts related to the exchange of different currencies, including foreign currency options, forward (delivery or nondelivery) contracts, and swaps entered into and existing as of the balance sheet date.

+ References

No definition available.

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- Definition

Fair value as of the balance sheet date of foreign currency derivative assets, net of foreign currency derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized on the balance sheet.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 107

-Paragraph 10

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets.

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-Publisher FASB

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Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

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Fair value as of the balance sheet date of interest rate derivative assets, net of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized on the balance sheet.

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Aggregate notional amount of all foreign currency derivatives not designated as hedging instruments. Notional amount refers to the number of currency units specified in the foreign currency derivative contract.

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-Glossary Notional Amount

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- Definition

Aggregate notional amount of all interest rate derivatives not designated as hedging instruments. Notional amount refers to the monetary amount specified in the interest rate derivative contract.

+ References

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