Annual report pursuant to Section 13 and 15(d)

Property, Plant and Equipment - Additional Information (Detail)

v2.4.0.8
Property, Plant and Equipment - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
0 Months Ended 12 Months Ended 0 Months Ended
Jun. 10, 2013
sqft
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Dec. 09, 2013
Operating Lease Amendment [Member]
sqft
Operating Leased Assets [Line Items]          
Lease agreement expenses   $ 9.5 $ 7.7 $ 1.9  
Office space area of leased premises 4,421       3,624
Lease commencement period Aug. 01, 2013        
Lease agreement period 64 months        
Extension of lease period 5 years        
Lease expiration date         Jan. 31, 2020