Securities Available-for-Sale - Unrealized Gains (Losses) (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Investments, Debt and Equity Securities [Abstract]
Total unrealized gains/(losses) on securities available for sale, Gross Unrealized Gains	$ 12,647	$ 6,802
Total unrealized gains/(losses) on securities available for sale, Gross Unrealized Losses	(1,837)	(7,776)
Total unrealized gains/(losses) on securities available for sale, Net Unrealized Gains	10,810	(974)
Income tax expense/(benefit), Gross Unrealized Gains	4,426	2,381
Income tax expense/(benefit), Gross Unrealized Losses	(643)	(2,722)
Income tax expense/(benefit), Net Unrealized Gains	3,783	(341)
Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss)	8,221	4,421
Net unrealized gains/(losses), net of tax included in accumulated other comprehensive income/(loss)	(1,194)	(5,054)
Accumulated Other Comprehensive Income (Loss), Available-for-sale Securities Adjustment, Net of Tax	$ 7,027	$ (633)