Securities Available-for-Sale - Unrealized Gains (Losses) (Details) - USD ($) $ in Thousands	Dec. 31, 2016	Dec. 31, 2015
Investments, Debt and Equity Securities [Abstract]
Total unrealized gains/(losses) on securities available for sale, Gross Unrealized Gains	$ 10,754	$ 11,897
Total unrealized gains/(losses) on securities available for sale, Gross Unrealized Losses	(3,472)	(1,716)
Total unrealized gains/(losses) on securities available for sale, Net Unrealized Gains	7,282	10,181
Income tax expense/(benefit), Gross Unrealized Gains	(3,776)	(4,164)
Income tax expense/(benefit), Gross Unrealized Losses	1,219	601
Income tax expense/(benefit), Net Unrealized Gains	(2,557)	(3,563)
Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss)	6,978	7,733
Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss)	(2,253)	(1,115)
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	$ 4,725	$ 6,618