Accumulated Other Comprehensive Income Change in other comprehensive income for period (Parenthetical) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Equity [Abstract]
Net unrealized gains on investment securities tax	$ 89	$ 902	$ 1,911	$ 2,870
Reclassification adjustment for investment securities transactions tax	4	8	48	135
Unrealized gain on interest rate swaps tax	$ 39	$ 2	$ 14	$ 103