Charges Related To Restructuring Activities Narrative (Details) - USD ($)	3 Months Ended			6 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Restructuring Cost and Reserve [Line Items]
Charges	$ 1,321,000	$ 692,000	$ 344,000	$ 2,013,000	$ 745,000
Restructuring and Related Activities, Expected Payout Period				12 months
Payments	(888,000)	(1,225,000)		$ (2,113,000)	(3,474,000)
Severance
Restructuring Cost and Reserve [Line Items]
Charges	1,299,000	670,000
Payments	(839,000)	(1,205,000)
Contract Termination
Restructuring Cost and Reserve [Line Items]
Charges		22,000
Restructuring Reserve, Accrual Adjustment	22,000
Payments	(49,000)	(20,000)
North America
Restructuring Cost and Reserve [Line Items]
Charges		553,000	(11,000)	1,208,000	86,000
Restructuring Reserve, Accrual Adjustment	655,000
Payments	(515,000)	(688,000)
North America | Severance
Restructuring Cost and Reserve [Line Items]
Charges	633,000	531,000		1,164,000	221,000
Payments	(466,000)	(668,000)
North America | Contract Termination
Restructuring Cost and Reserve [Line Items]
Charges				44,000	(135,000)
Restructuring Reserve, Accrual Adjustment	22,000	22,000
Payments	(49,000)	(20,000)
Europe
Restructuring Cost and Reserve [Line Items]
Charges	320,000		108,000	640,000	401,000
Payments	(309,000)	(225,000)
Europe | Severance
Restructuring Cost and Reserve [Line Items]
Charges	320,000	320,000		640,000	401,000
Payments	(309,000)	(225,000)
Europe | Contract Termination
Restructuring Cost and Reserve [Line Items]
Charges	0	0
Payments	0	0
All Other
Restructuring Cost and Reserve [Line Items]
Charges	346,000	(181,000)	$ 247,000	$ 165,000	258,000
Payments	(64,000)	(312,000)
All Other | Severance
Restructuring Cost and Reserve [Line Items]
Charges	346,000	(181,000)			$ 258,000
Payments	(64,000)	(312,000)
All Other | Contract Termination
Restructuring Cost and Reserve [Line Items]
Charges	0	0
Payments	$ 0	$ 0