Restructuring - Summary of Restructuring Charges (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Restructuring Cost and Reserve [Line Items]
Total Restructuring Expenses	$ 5,516	$ 537	$ 37,535	$ 561
Right-of-Use Asset Impairment and Operating Lease Charges
Restructuring Cost and Reserve [Line Items]
Total Restructuring Expenses	1,828	586	26,616	1,512
Fixed Asset Impairment
Restructuring Cost and Reserve [Line Items]
Total Restructuring Expenses	2,174	0	4,743	0
Severance
Restructuring Cost and Reserve [Line Items]
Total Restructuring Expenses	376	0	3,368	601
Other Expenses (Reversals)
Restructuring Cost and Reserve [Line Items]
Total Restructuring Expenses	73	0	1,743	(1,176)
Loss (Gain) on Sale of Store Properties
Restructuring Cost and Reserve [Line Items]
Total Restructuring Expenses	$ 1,065	$ (49)	$ 1,065	$ (376)