Nature of Operations and Summary of Significant Accounting Policies--Property and Equipment (Details)	12 Months Ended
	Dec. 31, 2013
Furniture and fixtures
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	10 years
Automobiles and trucks
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years
Machinery and equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	10 years
Machinery and equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	20 years
Office and computer equipment | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	5 years
Office and computer equipment | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	10 years
Building and improvements | Minimum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	10 years
Building and improvements | Maximum
Property, Plant and Equipment [Line Items]
Property and equipment, useful life	40 years