Business Acquisition (Details) (USD $)	9 Months Ended
	Sep. 30, 2014	Dec. 31, 2013
Goodwill, Acquired During Period	$ 79,600,000
Goodwill	533,403,000	457,422,000
Business Acquisition, Purchase Price Allocation, Goodwill, Expected Tax Deductible Amount	20,900,000
Business Acquisition Contributed Total Revenue	32,000,000
Total consideration of transaction, net of cash acquired	176,300,000
Business Combination, Consideration Transferred, Liabilities Incurred	$ 34,900,000