Segment Reporting - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2014 Segment
Segment Reporting Information [Line Items]
Number of reportable segments	5
Number of customers accounted for 10% or more of net revenue	No single customer accounted for 10% or more of our net revenues from continuing operations in 2014
Customer Concentration Risk | Net Revenues | Five Largest Customers
Segment Reporting Information [Line Items]
Largest customer, percentage of net revenues	15.70%
Customer Concentration Risk | Net Revenues | Ten Largest Customers
Segment Reporting Information [Line Items]
Largest customer, percentage of net revenues	23.70%