Restructuring Activities (Narrative) (Details) $ in Thousands	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2015 USD ($) store	Sep. 30, 2014 USD ($)	Sep. 30, 2015 USD ($) store	Sep. 30, 2014 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring charges total	$ 981	$ 8,168	$ 7,454	$ 16,507
Number of stores closed | store	2		18
Accrued liability related to store closures	$ 2,700		$ 2,700			$ 4,900
Scenario, Forecast [Member] | Maximum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges total					$ 12,000
Scenario, Forecast [Member] | Minimum [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges total					$ 8,000