Description of Business and Summary of Significant Accounting Policies (Details 4)	12 Months Ended
	Dec. 31, 2013
Construction equipment | Minimum
Property, Plant and Equipment
Estimated useful lives	5 years
Construction equipment | Maximum
Property, Plant and Equipment
Estimated useful lives	20 years
Remaining depreciable property | Minimum
Property, Plant and Equipment
Estimated useful lives	3 years
Remaining depreciable property | Maximum
Property, Plant and Equipment
Estimated useful lives	40 years