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, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Gain (Loss) on Investments [Line Items]
Gross Realized Gains	$ 112	$ 2,415	$ 1,059	$ 6,560
Gross Realized Losses	(36)	0	(36)	0
Net Gains (Losses)	76	2,415	1,023	6,560
Equity Securities [Member]
Gain (Loss) on Investments [Line Items]
Gross Realized Gains	4	2,290	737	4,260
Gross Realized Losses	(10)	0	(10)	0
Net Gains (Losses)	(6)	2,290	727	4,260
Debt Securities [Member]
Gain (Loss) on Investments [Line Items]
Gross Realized Gains	108	125	322	2,300
Gross Realized Losses	(26)	0	(26)	0
Net Gains (Losses)	$ 82	$ 125	$ 296	$ 2,300