Investment Securities Summary of Gains and Losses from Equity and Debt Securities, and Losses from Other-than-Temporary Impairment (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Gain (Loss) on Investments [Line Items]
Gross Realized Gains	$ 2,415	$ 1,124	$ 6,560	$ 1,447
Gross Realized Losses	0	0	0	(323)
Other-than- temporary Impairment Losses	0	12	0	12
Net Gains (Losses)	2,415	1,112	6,560	1,112
Equity Securities [Member]
Gain (Loss) on Investments [Line Items]
Gross Realized Gains	2,290	0	4,260	1
Gross Realized Losses	0	0	0	0
Other-than- temporary Impairment Losses	0	12	0	12
Net Gains (Losses)	2,290	(12)	4,260	(11)
Debt Securities [Member]
Gain (Loss) on Investments [Line Items]
Gross Realized Gains	125	1,124	2,300	1,446
Gross Realized Losses	0	0	0	(323)
Other-than- temporary Impairment Losses	0	0	0	0
Net Gains (Losses)	$ 125	$ 1,124	$ 2,300	$ 1,123