Investment Securities-Schedule of Unrealized Loss on Investments (Details) - USD ($) $ in Thousands		12 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss		$ 60
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		7,623
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss		0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss		60
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value		7,623
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		1,403	$ 3
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		47,162	2,996
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		537	375
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		11,446	36,537
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		1,940	378
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		58,608	39,533
Securities Continuous Unrealized Loss Position, Less than 12 months		1,463
Securities Continuous Unrealized Loss Position Less than 12 months Fair Value		54,785
Securities, Continuous Unrealized Loss Position ,12 months or Longer		537
Securities, Continuous Unrealized Loss Position, 12 months or Longer, Fair Value		11,446
Unrealized Loss on Securities		2,000	378
Securities Continuous Unrealized Loss Position, Fair Value		66,231
Mortgage-Backed Securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		1,171	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		34,716	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		41	136
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		1,942	15,502
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		1,212	136
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		36,658	15,502
US Government Agency Securities
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		92	3
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		7,482	2,996
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0	32
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		0	11,242
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		92	35
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		7,482	14,238
Corporate Bonds
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		140
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		4,964
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		140
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		4,964
Other investments
Schedule of Available-for-sale Securities [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	[1]	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value	[1]	0	0
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	[1]	496	207
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	[1]	9,504	9,793
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	[1]	496	207
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	[1]	9,504	$ 9,793
Mortgage-Backed Securities
Schedule of Held-to-maturity Securities [Line Items]
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than 12 Months, Aggregate Loss		60
Held-to-maturity Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		7,623
Held-to-maturity Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Loss		0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		0
Held-to-maturity Securities, Continuous Unrealized Loss Position, Aggregate Loss		60
Held-to-maturity Securities, Continuous Unrealized Loss Position, Fair Value		$ 7,623

[1] 1) Primarily comprised of an investment in a CRA fund with 95% of its underlying investments consisting of government and agency backed securities.