Investments - Summary of Maturities (Details) $ in Thousands	Sep. 30, 2016 USD ($)
Available-for-sale Maturity, Amortized Cost
Within one year	$ 1,287
After one year, but within five	5,278
After five years, but within ten	15,473
After ten years	121,555
Total	143,593
Available-for-sale Maturity, Fair Value
Within one year	1,294
After one year, but within five	5,416
After five years, but within ten	15,754
After ten years	122,594
Total	145,058
Carrying value of investment securities pledged	$ 97,500