Allowance for Loan Losses (Schedule of Defaulted Troubled Debt Restructuring) (Details) $ in Thousands	Mar. 31, 2016 USD ($)	Mar. 31, 2015 USD ($)
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	16	6
Financing receivable, modifications, subsequent default, recorded investment	$ 461	$ 499
Credit Card Receivable
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	3	2
Financing receivable, modifications, subsequent default, recorded investment	$ 2	$ 17
Credit Card Receivable | Originated Consumer Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	3	2
Financing receivable, modifications, subsequent default, recorded investment	$ 2	$ 17
Commercial and Industrial
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	0	2
Financing receivable, modifications, subsequent default, recorded investment	$ 0	$ 482
Commercial and Industrial | Originated Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	0	0
Financing receivable, modifications, subsequent default, recorded investment	$ 0	$ 0
Commercial and Industrial | Covered Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	0	1
Financing receivable, modifications, subsequent default, recorded investment	$ 0	$ 427
Commercial and Industrial | Acquired Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	0	1
Financing receivable, modifications, subsequent default, recorded investment	$ 0	$ 55
Commercial Real Estate
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	1	0
Financing receivable, modifications, subsequent default, recorded investment	$ 255	$ 0
Commercial Real Estate | Originated Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	0	0
Financing receivable, modifications, subsequent default, recorded investment	$ 0	$ 0
Commercial Real Estate | Covered Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	0	0
Financing receivable, modifications, subsequent default, recorded investment	$ 0	$ 0
Commercial Real Estate | Acquired Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	1	0
Financing receivable, modifications, subsequent default, recorded investment	$ 255	$ 0
Construction Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	0	0
Financing receivable, modifications, subsequent default, recorded investment	$ 0	$ 0
Construction Loans | Originated Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	0	0
Financing receivable, modifications, subsequent default, recorded investment	$ 0	$ 0
Construction Loans | Covered Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	0	0
Financing receivable, modifications, subsequent default, recorded investment	$ 0	$ 0
Construction Loans | Acquired Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	0	0
Financing receivable, modifications, subsequent default, recorded investment	$ 0	$ 0
Commercial Loan
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	1	2
Financing receivable, modifications, subsequent default, recorded investment	$ 255	$ 482
Commercial Loan | Originated Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	0	0
Financing receivable, modifications, subsequent default, recorded investment	$ 0	$ 0
Commercial Loan | Covered Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	0	1
Financing receivable, modifications, subsequent default, recorded investment	$ 0	$ 427
Commercial Loan | Acquired Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	1	1
Financing receivable, modifications, subsequent default, recorded investment	$ 255	$ 55
Installment
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	10
Financing receivable, modifications, subsequent default, recorded investment	$ 114
Installment | Originated Consumer Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	8
Financing receivable, modifications, subsequent default, recorded investment	$ 83
Installment | Acquired Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	2
Financing receivable, modifications, subsequent default, recorded investment	$ 31
Consumer Installment
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end		2
Financing receivable, modifications, subsequent default, recorded investment		$ 0
Consumer Installment | Originated Consumer Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end		2
Financing receivable, modifications, subsequent default, recorded investment		$ 0
Home Equity Line of Credit
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	1	0
Financing receivable, modifications, subsequent default, recorded investment	$ 14	$ 0
Home Equity Line of Credit | Originated Consumer Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	0	0
Financing receivable, modifications, subsequent default, recorded investment	$ 0	$ 0
Home Equity Line of Credit | Acquired Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	1
Financing receivable, modifications, subsequent default, recorded investment	$ 14
Residential Mortgages
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	1	0
Financing receivable, modifications, subsequent default, recorded investment	$ 76	$ 0
Residential Mortgages | Originated Consumer Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	1	0
Financing receivable, modifications, subsequent default, recorded investment	$ 76	$ 0
Residential Mortgages | Acquired Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	0
Financing receivable, modifications, subsequent default, recorded investment	$ 0
Total consumer
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	15	4
Financing receivable, modifications, subsequent default, recorded investment	$ 206	$ 17
Total consumer | Originated Consumer Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	12	4
Financing receivable, modifications, subsequent default, recorded investment	$ 161	$ 17
Total consumer | Acquired Loans
Troubled Debt Restructuring, Debtor, Current Period [Line Items]
Financing receivable, modifications, subsequent default, number of contracts at period end	3
Financing receivable, modifications, subsequent default, recorded investment	$ 45