Investment Securities - Narrative (Details)	3 Months Ended
	Mar. 31, 2016 USD ($) security	Mar. 31, 2015 USD ($) security	Dec. 31, 2015 USD ($)
Investments, Debt and Equity Securities [Abstract]
Number of private-label collateralized mortgage obligations | security	2
Combined balance of private-label collateralized mortgage obligations	$ 23,000
AFS and HTM securities in unrealized loss positions qualitative disclosure number of positions | security	32
Unrealized losses as a percentage of individual securities amortized cost basis	0.87%
Unrealized losses as percentage of Company's total amortized cost basis	0.25%
Number of securities in an unrealized loss position for over 12 months | security	15
Unamortized cost basis of securities in a continuous loss position	$ 40,700,000
Unrealized loss on securities in a continuous loss position	719,000
Impairment related to credit quality	$ 0
Securities sold, classified as available-for-sale | security	0	18
Available-for-sale securities, realized gain (loss)	$ 0	$ 115,000
Number of available-for-sale securities sold with gains | security	0	8
Available-for-sale securities, gross realized gains	$ 0	$ 250,000
Number of available-for-sale securities sold with losses | security	0	10
Available-for-sale securities, gross realized losses	$ 0	$ 135,000
Securities pledged as collateral for public funding	$ 321,100,000		$ 285,400,000