Summary of Significant Accounting Policies Schedule of Revisions and Reclassifications - Cash Flows (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
Net income	$ 87,949	$ 17,685	$ 31,781	$ 41,391	$ 32,037	$ 27,394	$ 34,435	$ 58,722	$ 178,806	$ 152,588		$ 155,434
Provision for deferred income taxes									129,671	71,708		71,685
(Decrease) increase in payables and other liabilities									(12,038)	(1,995)		26,360
Financials as previously reported [Member]
Net income										149,104	[1]	154,135	[1]
Provision for deferred income taxes										74,100	[1]	72,984	[1]
(Decrease) increase in payables and other liabilities										(284)	[1]	25,240	[1]
Restatement Adjustment [Member]
Net income										3,484	[1]	1,299	[1]
Provision for deferred income taxes										(2,282)	[1]	(1,299)	[1]
(Decrease) increase in payables and other liabilities										(1,202)	[1]	0	[1]
Reclassifications for purchase price adjustments and discontinued operations [Member]
Net income										0	[1]	0	[1]
Provision for deferred income taxes										(110)	[1]	0	[1]
(Decrease) increase in payables and other liabilities										(509)	[1]	1,120	[1]
Financials as adjusted [Domain]
Net income										152,588	[1]	155,434	[1]
Provision for deferred income taxes										71,708	[1]	71,685	[1]
(Decrease) increase in payables and other liabilities										$ (1,995)	[1]	$ 26,360	[1]

[1] These revisions had no net impact on Net cash provided by operating, investing, or financing activities.