Fair Value Accounting and Measurement (Quantitative Information About Level 3 Fair Value Measurements) (Details) (Fair Value, Measurements, Nonrecurring [Member], USD $) In Thousands, unless otherwise specified					3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013 Fair Value, Inputs, Level 3 [Member]	Mar. 31, 2012 Fair Value, Inputs, Level 3 [Member]	Mar. 31, 2012 Market Approach Valuation Technique [Member] Impaired Loans [Member] Minimum [Member] Fair Value, Inputs, Level 3 [Member]		Mar. 31, 2012 Market Approach Valuation Technique [Member] Impaired Loans [Member] Maximum [Member] Fair Value, Inputs, Level 3 [Member]		Mar. 31, 2012 Market Approach Valuation Technique [Member] Impaired Loans [Member] Weighted Average [Member] Fair Value, Inputs, Level 3 [Member]		Mar. 31, 2012 Market Approach Valuation Technique [Member] Covered Other Real Estate Owned [Member] Minimum [Member] Fair Value, Inputs, Level 3 [Member]		Mar. 31, 2012 Market Approach Valuation Technique [Member] Covered Other Real Estate Owned [Member] Maximum [Member] Fair Value, Inputs, Level 3 [Member]		Mar. 31, 2012 Market Approach Valuation Technique [Member] Covered Other Real Estate Owned [Member] Weighted Average [Member] Fair Value, Inputs, Level 3 [Member]		Mar. 31, 2013 Noncovered Loans [Member]	Mar. 31, 2012 Noncovered Loans [Member]	Mar. 31, 2013 Noncovered Loans [Member] Fair Value, Inputs, Level 3 [Member]	Mar. 31, 2012 Noncovered Loans [Member] Fair Value, Inputs, Level 3 [Member]	Mar. 31, 2013 Covered Loans [Member]	Mar. 31, 2012 Covered Loans [Member]	Mar. 31, 2013 Covered Loans [Member] Fair Value, Inputs, Level 3 [Member]	Mar. 31, 2012 Covered Loans [Member] Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans	$ 477	$ 12,416	$ 477	$ 12,416
OREO																	1,350	3,510	1,350	3,510	65	1,917	65	1,917
OPPO																		$ 2,334		$ 2,334
Fair Value Inputs, Comparability Adjustments					0.00%	[1]	37.00%	[1]	12.00%	[1]	0.00%	[1]	23.00%	[1]	3.00%	[1]

[1] (1) Discount applied to appraisal value, letter of intent to purchase, or stated value (in the case of accounts receivable and inventory).