Commitments, Contingencies And Guarantees (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Payment Required Upon Termination Of Employment [Line Items]
Rent expense charged to operations	$ 17,200,000	$ 15,800,000	$ 15,400,000
Minimum royalty payments due through 2027	3,300,000
Contingent commitments, not accrued	5,500,000
Business Combination, Contingent Consideration, Liability	6,300,000
Total contingent liabilities	11,800,000
Purchase Obligation	11,400,000
Other Liabilities	2,500,000	3,100,000
Outstanding letters of credit to insurance company as security for workers' compensation claims	1,300,000
Period for continued vesting of outstanding equity awards upon termination of CEO without cause other than following a change in control, years	two years
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Contingent Liability		3,100,000
Payment Required To CEO Upon Termination Of Employment Without Cause Other Than Following Change In Control [Member]
Payment Required Upon Termination Of Employment [Line Items]
Employee agreement contingencies	1,600,000
Payment Required To Officers Upon Termination Of Employment Following Change Of Control [Member]
Payment Required Upon Termination Of Employment [Line Items]
Employee agreement contingencies	24,800,000
Workers Compensation Insurance Policies [Member]
Payment Required Upon Termination Of Employment [Line Items]
Retained claim liability per incident	300,000	250,000	250,000
Loss contingency, range of possible loss, maximum	2,300,000	2,000,000	2,000,000
Self Insurance Reserve	1,400,000	1,200,000
Workers Compensation Insurance Policies [Member] | Cumulative Expense for Claims Incurred in 2014 [Member]
Payment Required Upon Termination Of Employment [Line Items]
General insurance expense	1,100,000
Workers Compensation Insurance Policies [Member] | Cumulative Expense for Claims Incurred in 2013 [Member]
Payment Required Upon Termination Of Employment [Line Items]
General insurance expense	500,000
Workers Compensation Insurance Policies [Member] | Cumulative Expense For Claims Incurred In 2012 [Member]
Payment Required Upon Termination Of Employment [Line Items]
General insurance expense	600,000
Employee Health Care Insurance Policy [Member]
Payment Required Upon Termination Of Employment [Line Items]
Retained claim liability per incident	375,000	325,000	300,000
General insurance expense	32,000,000	29,200,000	23,000,000
Self Insurance Reserve	$ 4,100,000	$ 4,300,000