Acquisitions Business Acquisition, Pro Forma Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Business Acquisition [Line Items]
Pro Forma Interest Income		$ 280,102	$ 280,455
Pro Forma Non Interest Income		114,984	120,005
Business Acquisition, Pro Forma Revenue		395,086	400,460
Expenses Related to Acquisition Excluded From Pro Forma Net Income	$ 5,052
Business Acquisition, Pro Forma Net Income (Loss)		$ 87,129	$ 84,264