Income Taxes (Details) (USD $)	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2013
Income Tax Disclosure [Abstract]
Benefit from income taxes	$ 3,419,000	$ 2,555,000	$ 4,915,000	$ (123,774,000)
Unrecognized tax benefits	$ 5,700,000		$ 5,700,000		$ 2,000,000