Commitments and Contingencies (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Commitments and Contingencies Disclosure [Abstract]
Rental expense	$ 231,300	$ 239,200	$ 244,300
Future Minimum Rental Payment under Operating Leases (Table Details) [Abstract]
2017	165,187
2018	129,858
2019	95,133
2020	63,584
2021	28,604
Thereafter	5,256
Total future minimum rental payments	487,622
Guarantor Obligations [Line Items]
Maximum financing amount	47,000
Amount outstanding	2,800
Citibank [Member]
Guarantor Obligations [Line Items]
Maximum financing amount	27,000
Texas Capital Bank [Member]
Guarantor Obligations [Line Items]
Maximum financing amount	$ 20,000