Investment Securities - Summary of Maturities (Details) $ in Thousands	Mar. 31, 2017 USD ($)
Available for sale, Amortized Cost
Within one year	$ 200
After one year, but within five	21,426
After five years, but within ten	16,822
After ten years	123,006
Total	161,454
Available for sale, Fair Value
Within one year	202
After one year, but within five	21,390
After five years, but within ten	16,638
After ten years	120,470
Total	158,700
Carrying value of investment securities pledged	$ 74,100