Non-Cash Investing and Financing Activities Non-Cash Investing and Financing Activities (Details 5) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Supplemental Cash Flow Information
Interest paid	$ 98,599	$ 38,092	$ 21,168
Income taxes paid	$ 14,405	$ 12,501	$ 33,641