Investment Securities - Gross Gains and Losses on Sales and Redemptions of Available for Sale Securities and Other Than Temporary Impairment Losses Recognized (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Sales and Redemptions of Available for Sale Securities:
Gross gains	$ 844	$ 239	$ 1,425	$ 487
Gross losses
Other-than-temporary impairment losses