Proceeds From Sales and Calls of Investment Securities and Associates Gains or Losses (Details) - USD ($) $ in Thousands		3 Months Ended		6 Months Ended
		Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Available-for-sale
Proceeds from sales and calls of investment securities		$ 29,861	$ 11,918	$ 88,484	$ 74,621
Gross realized gains	[1]	143	43	943	82
Gross realized losses	[1]	(261)	(92)	(1,000)	(127)
Held-to-maturity
Proceeds from calls of investment securities		10,470	9,605	21,625	10,065
Gross realized gains	[1]	44	14	91	15
Gross realized losses	[1]	$ (146)	$ (63)	$ (146)	$ (63)

[1] The gain or loss on the sale or call of each investment security is determined by the specific identification method.