Other Financial Information (Narrative) (Details) (USD $)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Condensed Financial Information Of Parent Company Only Disclosure [Abstract]
Net gains (losses) from foreign currency transactions	$ 40,596,000	$ 73,732,000	$ 5,092,000
Income taxes paid	573,799,000	457,006,000	566,999,000
Interest paid, net of amounts capitalized	$ 114,232,000	$ 60,501,000	$ 9,501,000