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
	Jun. 30, 2013		Jun. 30, 2012
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans	$ 4,198		$ 14,139
Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans	4,198		14,139
Noncovered Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
OREO	1,965		4,430
OPPO			880
Noncovered Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
OREO	1,965		4,430
OPPO			880
Covered Loans [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
OREO	395		1,491
Covered Loans [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
OREO	395		1,491
Real Estate Collateral [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans	3,777		11,896
Other Collateral [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Impaired loans	$ 421		$ 2,243
Other Collateral [Member] | Market Approach Valuation Technique [Member] | Impaired Loans [Member] | Minimum [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments			0.00%	[1]
Other Collateral [Member] | Market Approach Valuation Technique [Member] | Impaired Loans [Member] | Maximum [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments			70.00%	[1]
Other Collateral [Member] | Market Approach Valuation Technique [Member] | Impaired Loans [Member] | Weighted Average [Member] | Fair Value, Inputs, Level 3 [Member]
Fair Value Inputs, Assets, Quantitative Information [Line Items]
Fair Value Inputs, Comparability Adjustments	50.00%	[1],[2]	27.00%	[1],[2]

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

[2] (3) Other collateral consists of accounts receivable and inventory.