Restructuring Charges (Narrative) (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($)	Sep. 30, 2014 USD ($)	Dec. 31, 2014 branches
Restructuring Cost and Reserve [Line Items]
Gain on disposition of certain branch locations			$ 374
Other operating expenses	$ 22,400	$ 33,475	67,816	$ 72,839
Number of branches closed | branches					13
Facility Closing [Member]
Restructuring Cost and Reserve [Line Items]
Other operating expenses			$ 341