Investment Securities: Schedule of Temporarily Impaired Securities, Fair Value and Unrealized losses (Details) (USD $) In Thousands, unless otherwise specified	Sep. 30, 2013	Mar. 31, 2013
Trust preferred
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	$ 1,927	$ 1,238
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	(104)	(1,528)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	1,927	1,238
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	(104)	(1,528)
US Government Agencies Debt Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	16,967	4,978
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(471)	(22)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	16,967	4,978
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	(471)	(22)
Investment Securities
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	16,967	4,978
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Losses	(471)	(22)
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	1,927	1,238
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	(104)	(1,528)
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	18,894	6,216
Available-for-sale Securities, Continuous Unrealized Loss Position, Aggregate Losses	$ (575)	$ (1,550)