Investment Securities - Narrative (Details)	6 Months Ended
	Jun. 30, 2017 USD ($) security	Jun. 30, 2016 USD ($) security	Dec. 31, 2016 USD ($)
Investments, Debt and Equity Securities [Abstract]
Number of private-label collateralized mortgage obligations | security	1
Combined balance of private-label collateralized mortgage obligations	$ 14,000
AFS and HTM securities in unrealized loss positions qualitative disclosure number of positions | security	49
Unrealized losses as a percentage of individual securities amortized cost basis	1.22%
Unrealized losses as percentage of Company's total amortized cost basis	0.57%
Number of securities in an unrealized loss position for over 12 months | security	10
Amortized cost basis of securities in a continuous loss position	$ 31,400,000
Unrealized loss on securities in a continuous loss position	666,000
Impairment related to credit quality	$ 0
Number of Available for sale Securities Sold | security	10
Number Of Held to Maturity Securities Sold | security	1
Available-for-sale securities, realized gain (loss)	$ 2,000
Held-to-maturity Securities, Sold Security, Realized Gain (Loss)	$ 7,000
Number of available-for-sale securities sold with gains | security	7	2
Available-for-sale securities, gross realized gains	$ 111,000	$ 20,000
Number of available-for-sale securities sold with losses | security	3
Available-for-sale securities, gross realized losses	$ 109,000
Securities pledged as collateral for public funding	$ 294,500,000		$ 293,400,000