Leases (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013	Dec. 31, 2012
Operating Leased Assets [Line Items]
2015	$ 44,790
2016	33,978
2017	23,609
2018	16,483
2019	13,785
Thereafter	16,638
Total Due	149,283
Rent expense	72,164		75,348	74,849
Real Estate
Operating Leased Assets [Line Items]
2015	30,233
2016	25,892
2017	19,205
2018	14,725
2019	13,004
Thereafter	16,148
Total Due	119,207
Vehicles and Equipment
Operating Leased Assets [Line Items]
2015	14,557	[1]
2016	8,086	[1]
2017	4,404	[1]
2018	1,758	[1]
2019	781	[1]
Thereafter	490	[1]
Total Due	$ 30,076	[1]
Minimum | Vehicles and Equipment
Operating Leased Assets [Line Items]
Term of operating lease	36 months
Maximum | Vehicles and Equipment
Operating Leased Assets [Line Items]
Term of operating lease	60 months

[1] The Company leases vehicles with contractual terms of 36 to 60 months that are cancellable after 12 months without penalty. Future minimum lease payments reflect only the minimum payments during the initial 12-month non-cancellable term.