Securities Available-for-Sale - Unrealized Gains (Losses) (Details) - USD ($) $ in Thousands	Sep. 30, 2016	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Total unrealized gains/(losses) on securities available for sale, Gross Unrealized Gains	$ 21,938	$ 11,897
Total unrealized gains/(losses) on securities available for sale, Gross Unrealized Losses	(8)	(1,716)
Total unrealized gains/(losses) on securities available for sale, Net Unrealized Gains/(Losses)	21,930	10,181
Income tax expense/(benefit), Gross Unrealized Gains	7,678	4,164
Income tax expense/(benefit), Gross Unrealized Losses	(3)	(601)
Income tax expense/(benefit), Net Unrealized Gains/(Losses)	7,675	3,563
Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss), Gross Unrealized Gains	14,260	7,733
Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss), Gross Unrealized Losses	(5)	(1,115)
Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss), Net Unrealized Gains/(Losses)	$ 14,255	$ 6,618