Balance Sheet Details (Details Textual) (USD $)	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Property, Plant and Equipment [Line Items]
Capitalized Internal Use Software Development Costs	$ 16,200,000	$ 14,600,000
Capitalized Internal Use Software Amortization	4,500,000	2,800,000	1,800,000
Balance Sheet Details (Textual) [Abstract]
Depreciation expense	43,800,000	39,500,000	29,600,000
Assets recorded under capital leases	1,800,000	1,400,000
Amortization expense related to intangible assets	$ 19,326,000	$ 12,430,000	$ 6,609,000