Restructuring Charges (Narrative) (Details) $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2015 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($) branches	Dec. 31, 2013 USD ($)
Restructuring Cost and Reserve [Line Items]
Gain (Loss) on Disposition of Certain Business Unit		$ 401
Other operating expenses		$ 91,370	$ 94,337	$ 103,180
Number of branches closed | branches			13
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Other operating expenses	$ 437