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Investment Securities (Other-than-temporarily Impaired Securities) (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Mar. 31, 2015
Jun. 30, 2016
Jun. 30, 2015
Other Than Temporary Impairment Credit Losses Recognized In Earnings Roll Forward      
Begging Balance $ 0 $ 1,490 $ 0
Reduction from Securities Solddurinf the period $ 0 (1,490) 0
Ending Balance   $ 0 $ 0