Income Taxes (Details) - Income Tax Provision - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Income Tax Disclosure [Abstract]
Income before income taxes	$ 80,275	$ 50,358	$ 146,847	$ 108,686
Income tax provision	18,282	17,850	42,968	38,640
CONSOLIDATED NET INCOME	$ 61,993	$ 32,508	$ 103,879	$ 70,046
Income tax provision/benefit as a percentage of income/loss before income taxes	22.80%	35.40%	29.30%	35.60%