Income Tax (Pre-tax Income Foreign and Domestic) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Income Tax Disclosure [Abstract]
Income (Loss) from Continuing Operations before Income Taxes, Domestic									$ 768,857	$ 473,223	$ 644,219
Income (Loss) from Continuing Operations before Income Taxes, Foreign									239,676	162,031	275,004
Income before income taxes	$ 276,743	$ 231,815	$ 300,535	$ 199,440	$ 229,490	$ 201,695	$ (74,758)	$ 278,827	$ 1,008,533	$ 635,254	$ 919,223