Investment Securities-Schedule of Unrealized Loss on Investments (Details) - USD ($) $ in Thousands		Mar. 31, 2018	Mar. 31, 2017
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		$ 188	$ 60
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value		7,681	7,623
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		59	0
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value		1,612	0
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss		247	60
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value		9,293	7,623
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		181	1,403
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		11,368	47,162
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		2,545	537
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		48,907	11,446
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		2,726	1,940
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		60,275	58,608
Mortgage-Backed Securities
Schedule of Held-to-maturity Securities [Line Items]
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		188	60
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, Less than 12 Months, Fair Value		7,681	7,623
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		59	0
Debt Securities, Held-to-maturity, Continuous Unrealized Loss Position, 12 Months or Longer, Fair Value		1,612	0
Debt Securities, Held-to-maturity, Unrealized Loss Position, Accumulated Loss		247	60
Debt Securities, Held-to-maturity, Unrealized Loss Position, Fair Value		9,293	7,623
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		101	1,171
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		3,702	34,716
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		1,506	41
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		28,124	1,942
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		1,607	1,212
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		31,826	36,658
US Government Agency Securities
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		80	92
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		7,666	7,482
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		178	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		6,566	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		258	92
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		14,232	7,482
Corporate Bonds
Debt Securities, Available-for-sale [Line Items]
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss		0	140
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value		0	4,964
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss		212	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value		4,866	0
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss		212	140
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value		4,866	4,964
Other investments
Debt Securities, Available-for-sale [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]	649	496
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value	[1]	9,351	9,504
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	[1]	649	496
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	[1]	$ 9,351	$ 9,504

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