Fair Value Accounting (Fair Value Inputs, Assets, Quantitative Information) (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended		12 Months Ended
	Jun. 30, 2014		Dec. 31, 2013
Fair Value, Measurements, Recurring [Member] | Equity Securities [Member] | Individual Analysis of Each Investment [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure			$ 628
Fair Value, Measurements, Recurring [Member] | Trust Preferred Securities [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount for lack of marketability	0.00%	[1]	0.00%	[1]
Credit spread embedded in discount rate			4.00%	[1]
Fair Value, Measurements, Recurring [Member] | Trust Preferred Securities [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount for lack of marketability	10.00%	[1]	10.00%	[1]
Credit spread embedded in discount rate			4.80%	[1]
Fair Value, Measurements, Recurring [Member] | Trust Preferred Securities [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount for lack of marketability	0.00%	[1]	0.00%	[1]
Credit spread embedded in discount rate			4.41%	[1]
Fair Value, Measurements, Recurring [Member] | Trust Preferred Securities [Member] | Discounted Cash Flow [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	1,866		1,722
Fair Value, Measurements, Recurring [Member] | Trust Preferred Securities [Member] | Discounted Cash Flow [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Credit spread embedded in discount rate	4.00%	[1]
Fair Value, Measurements, Recurring [Member] | Trust Preferred Securities [Member] | Discounted Cash Flow [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Credit spread embedded in discount rate	4.90%	[1]
Fair Value, Measurements, Recurring [Member] | Trust Preferred Securities [Member] | Discounted Cash Flow [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Credit spread embedded in discount rate	4.45%	[1]
Fair Value, Measurements, Recurring [Member] | Private Equity Investments [Member] | Individual Analysis of Each Investment [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	27,376
Fair Value, Measurements, Recurring [Member] | Private Equity Investments [Member] | Individual Analysis of Each Investee Company [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure			27,745
Fair Value, Measurements, Recurring [Member] | Visa Derivative [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Probability-weighted potential outcomes of the Covered Litigation and related fees payable			400	[1]
Fair Value, Measurements, Recurring [Member] | Visa Derivative [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Probability-weighted potential outcomes of the Covered Litigation and related fees payable			2,700	[1]
Fair Value, Measurements, Recurring [Member] | Visa Derivative [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Probability-weighted potential outcomes of the Covered Litigation and related fees payable			2,700	[1]
Fair Value, Measurements, Recurring [Member] | Visa Derivative [Member] | Probability Model [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	2,438		2,706
Fair Value, Measurements, Recurring [Member] | Visa Derivative [Member] | Probability Model [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Probability-weighted potential outcomes of the Covered Litigation and related fees payable	400	[1]
Fair Value, Measurements, Recurring [Member] | Visa Derivative [Member] | Probability Model [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Probability-weighted potential outcomes of the Covered Litigation and related fees payable	2,400	[1]
Fair Value, Measurements, Recurring [Member] | Visa Derivative [Member] | Probability Model [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Probability-weighted potential outcomes of the Covered Litigation and related fees payable	2,400	[1]
Fair Value, Measurements, Recurring [Member] | Collateral Dependent Impaired Loans [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value			0.00%	[1]
Estimated selling costs			0.00%	[1]
Fair Value, Measurements, Recurring [Member] | Collateral Dependent Impaired Loans [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value			65.00%	[1]
Estimated selling costs			10.00%	[1]
Fair Value, Measurements, Recurring [Member] | Collateral Dependent Impaired Loans [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value			25.00%	[1]
Estimated selling costs			7.00%	[1]
Fair Value, Measurements, Recurring [Member] | Collateral Dependent Impaired Loans [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	0.00%	[1]
Estimated selling costs	0.00%	[1]
Fair Value, Measurements, Recurring [Member] | Collateral Dependent Impaired Loans [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	79.00%	[1]
Estimated selling costs	10.00%	[1]
Fair Value, Measurements, Recurring [Member] | Collateral Dependent Impaired Loans [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	42.00%	[1]
Estimated selling costs	7.00%	[1]
Fair Value, Measurements, Recurring [Member] | Other Loans Held for Sale [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value			0.00%	[1]
Estimated selling costs			0.00%	[1]
Fair Value, Measurements, Recurring [Member] | Other Loans Held for Sale [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value			12.00%	[1]
Estimated selling costs			10.00%	[1]
Fair Value, Measurements, Recurring [Member] | Other Loans Held for Sale [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value			4.00%	[1]
Estimated selling costs			7.00%	[1]
Fair Value, Measurements, Recurring [Member] | Other Loans Held for Sale [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	0.00%	[1]
Estimated selling costs	0.00%	[1]
Fair Value, Measurements, Recurring [Member] | Other Loans Held for Sale [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	19.00%	[1]
Estimated selling costs	10.00%	[1]
Fair Value, Measurements, Recurring [Member] | Other Loans Held for Sale [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	19.00%	[1]
Estimated selling costs	7.00%	[1]
Fair Value, Measurements, Recurring [Member] | Other Real Estate [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value			0.00%	[1]
Estimated selling costs			0.00%	[1]
Fair Value, Measurements, Recurring [Member] | Other Real Estate [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value			7.00%	[1]
Estimated selling costs			10.00%	[1]
Fair Value, Measurements, Recurring [Member] | Other Real Estate [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value			2.00%	[1]
Estimated selling costs			7.00%	[1]
Fair Value, Measurements, Recurring [Member] | Other Real Estate [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	0.00%	[1]
Estimated selling costs	0.00%	[1]
Fair Value, Measurements, Recurring [Member] | Other Real Estate [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	4.00%	[1]
Estimated selling costs	10.00%	[1]
Fair Value, Measurements, Recurring [Member] | Other Real Estate [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	2.00%	[1]
Estimated selling costs	7.00%	[1]
Fair Value, Measurements, Recurring [Member] | Other Assets Held for Sale [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value			5.00%	[1]
Estimated selling costs			0.00%	[1]
Fair Value, Measurements, Recurring [Member] | Other Assets Held for Sale [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value			36.00%	[1]
Estimated selling costs			10.00%	[1]
Fair Value, Measurements, Recurring [Member] | Other Assets Held for Sale [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value			20.00%	[1]
Estimated selling costs			7.00%	[1]
Fair Value, Measurements, Recurring [Member] | Other Assets Held for Sale [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs or BOV [Member] | Minimum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	9.00%	[1]
Estimated selling costs	0.00%	[1]
Fair Value, Measurements, Recurring [Member] | Other Assets Held for Sale [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs or BOV [Member] | Maximum [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	80.00%	[1]
Estimated selling costs	10.00%	[1]
Fair Value, Measurements, Recurring [Member] | Other Assets Held for Sale [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs or BOV [Member] | Weighted Average [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Discount to appraised value	55.00%	[1]
Estimated selling costs	7.00%	[1]
Fair Value, Measurements, Nonrecurring [Member] | Collateral Dependent Impaired Loans [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	11,190		170,693
Fair Value, Measurements, Nonrecurring [Member] | Other Loans Held for Sale [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	2,045		9,670
Fair Value, Measurements, Nonrecurring [Member] | Other Real Estate [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	18,746		50,070
Fair Value, Measurements, Nonrecurring [Member] | Other Assets Held for Sale [Member] | Third Party Appraised value of Collateral Less Estimated Selling Costs or BOV [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Assets, Fair Value Disclosure	$ 5,394		$ 4,945

[1] The range represents management's best estimate of the high and low of the value that would be assigned to a particular input. For assets measured at fair value on a non-recurring basis, the weighted average is the measure of central tendencies; it is not the value that management is using for the asset or liability.