Goodwill and Identifiable Assets (Acquired Intangible Assets) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014
Intangible assets subject to amortization:
Gross Carrying Amount	$ 296,910	$ 163,027
Accumulated Amortization	124,615	90,743
Net Carrying Amount	172,295	72,284
Intangible assets not subject to amortization:
Trademarks, Carrying Amount	245,630	178,325
Goodwill	874,906	512,060
Total
Gross Carrying Amount	542,540	341,352
Net Carrying Amount	417,925	250,609
Customer Relationships [Member]
Intangible assets subject to amortization:
Gross Carrying Amount	196,472	101,141
Accumulated Amortization	74,640	53,434
Net Carrying Amount	$ 121,832	47,707
Customer Relationships [Member] | Minimum [Member]
Intangible Assets [Line Items]
Estimated Useful Life	2 months
Customer Relationships [Member] | Maximum [Member]
Intangible Assets [Line Items]
Estimated Useful Life	10 years
Contractor Relations [Member]
Intangible assets subject to amortization:
Gross Carrying Amount	$ 69,764	39,332
Accumulated Amortization	40,124	32,021
Net Carrying Amount	$ 29,640	7,311
Contractor Relations [Member] | Minimum [Member]
Intangible Assets [Line Items]
Estimated Useful Life	2 years
Contractor Relations [Member] | Maximum [Member]
Intangible Assets [Line Items]
Estimated Useful Life	5 years
Noncompete Agreements [Member]
Intangible assets subject to amortization:
Gross Carrying Amount	$ 10,874	3,654
Accumulated Amortization	3,163	1,922
Net Carrying Amount	$ 7,711	1,732
Noncompete Agreements [Member] | Minimum [Member]
Intangible Assets [Line Items]
Estimated Useful Life	2 years
Noncompete Agreements [Member] | Maximum [Member]
Intangible Assets [Line Items]
Estimated Useful Life	7 years
Contract-Based Intangible Assets [Member]
Intangible Assets [Line Items]
Estimated Useful Life	5 years
Intangible assets subject to amortization:
Gross Carrying Amount	$ 900
Accumulated Amortization	172
Net Carrying Amount	$ 728
Computer Software, Intangible Asset [Member]
Intangible Assets [Line Items]
Estimated Useful Life	6 years
Intangible assets subject to amortization:
Gross Carrying Amount	$ 18,900	18,900
Accumulated Amortization	6,516	3,366
Net Carrying Amount	$ 12,384	$ 15,534