Consolidation and Nature of Operations (Details) (USD $) In Thousands, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash Flows from Operating Activities
Income tax receivable - net	$ 135,517	$ 779
Accrued taxes	30,709	4,253
Cash paid (received) during the period for:
Income taxes, net of refunds	(131,154)	(9)
Interest, net of amounts capitalized	90,707	91,346
Significant non-cash investing and financing activities:
Accrued capital expenditures	19,668	8,904
Dividends accrued but not yet paid	62,656	59,946
As previously reported
Cash Flows from Operating Activities
Accrued taxes and income tax receivable		5,032
Changes to conform to current year presentation
Cash Flows from Operating Activities
Accrued taxes and income tax receivable		(5,032)
Income tax receivable - net		779
Accrued taxes		$ 4,253