Other Charges - Operating Expenses (Details)	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($) store	Sep. 30, 2016 USD ($)	Sep. 30, 2015 USD ($) store	Dec. 31, 2015 USD ($)
Restructuring Cost and Reserve [Line Items]
Store Consolidation Plan - Number of Stores Closed	96
Restructuring and Related Cost, Incurred Cost			$ 2,300,000
Restructuring charge, total					$ 4,569,000
Restructuring charge, store decommissioning					0
Restructuring charge, future lease obligation					1,229,000
Severance costs					$ 3,340,000
Start-up and Decommissioning Costs	$ 2,800,000	$ 1,200,000
u.s. core [Member]
Restructuring Cost and Reserve [Line Items]
Store Consolidation Plan - Number of Stores Closed	167
2015 Canada Store Sale [Member] | Core U.S. [Member]
Restructuring Cost and Reserve [Line Items]
Store Consolidation Plan - Number of Stores Closed | store		14
Gain (Loss) on Disposition of Business		$ 300,000
2015 Other Store Sale [Member]
Restructuring Cost and Reserve [Line Items]
Gain (Loss) on Disposition of Business		$ 300,000		$ 900,000
2015 Other Store Sale [Member] | Core U.S. [Member]
Restructuring Cost and Reserve [Line Items]
Store Consolidation Plan - Number of Stores Closed | store		6		3
Gain (Loss) on Disposition of Business		$ 4,900,000
2015 Core U.S. Store Consolidation Plan [Member] | Core U.S. [Member]
Restructuring Cost and Reserve [Line Items]
Store Consolidation Plan - Number of Stores Closed | store		65
Restructuring charge, total	$ 1,000,000
Restructuring charge, accelerated depreciation and asset write-off	1,200,000
Restructuring charge, early lease termination	2,700,000
Restructuring charge, store decommissioning	4,300,000
2014 Core U.S. Store Consolidation Plan [Member] | Core U.S. [Member]
Restructuring Cost and Reserve [Line Items]
Store Consolidation Plan - Number of Stores Closed | store		22
Restructuring charge, total				$ 19,900,000
Restructuring charge, store decommissioning				$ 300,000
Mexico Store Consolidation Plan [Member] | Mexico [Member]
Restructuring Cost and Reserve [Line Items]
Store Consolidation Plan - Number of Stores Closed			14	34
Restructuring charge, total				$ 3,100,000
Restructuring Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charge, total			$ 17,782,000
Restructuring charge, store decommissioning			1,281,000
Restructuring charge, future lease obligation	15,134,000		15,134,000
Severance costs			1,367,000
Restructuring Charges-Payments [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charge, total			(10,806,000)
Restructuring charge, store decommissioning			(1,281,000)
Restructuring charge, future lease obligation	(7,109,000)		(7,109,000)
Severance costs			(2,416,000)
Restructuring Charges-Total [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charge, total			11,545,000
Restructuring charge, store decommissioning			0
Restructuring charge, future lease obligation	$ 9,254,000		9,254,000
Severance costs			2,291,000
Non-Cash Charges [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charge, total			22,240,000
Gain (Loss) on Disposition of Assets			3,515,000
Gain (loss) on sale of fixed assets			283,000
Other Restructuring Costs			$ 660,000