Investment Securities (Summary Of Interest Income On Available-For-Sale Investment Securities) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Jun. 30, 2012	Jun. 30, 2011
Schedule of Available-for-sale Securities [Line Items]
Total taxable interest income	$ 1,184	$ 1,299
Total tax-exempt interest income	283	235
Total	1,467	1,534
U.S Treasury And Government Sponsored Entities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total taxable interest income	553	816
U.S. Agency mortgage-backed securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total taxable interest income	1	1
Other [Member]
Schedule of Available-for-sale Securities [Line Items]
Total taxable interest income	630	482
Municipal Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Total tax-exempt interest income	$ 283	$ 235