Restructuring - Narrative (Details) $ in Thousands	3 Months Ended			6 Months Ended		36 Months Ended	42 Months Ended
Restructuring - Narrative (Details) $ in Thousands	Jun. 30, 2019 USD ($) store	Mar. 31, 2019 store	Jun. 30, 2018 USD ($)	Jun. 30, 2019 USD ($)	Jun. 30, 2018 USD ($)	Dec. 31, 2018 store	Jun. 30, 2019 USD ($)
Restructuring Cost and Reserve [Line Items]
Total Restructuring Expenses	$ 18,738		$ (882)	$ 32,019	$ 24
Restructuring and related cost, number of store closures \| store	70	84
Restructuring Program 2019
Restructuring Cost and Reserve [Line Items]
Total Restructuring Expenses	$ 18,100			31,000
Restructuring Program 2016 and 2017
Restructuring Cost and Reserve [Line Items]
Total Restructuring Expenses	600			1,000			$ 40,300
Gain on Sale of Closed Store Properties
Restructuring Cost and Reserve [Line Items]
Total Restructuring Expenses	$ 0		$ 0	$ 0	$ (327)
Restructuring and related cost, number of store closures \| store						139