Condensed Consolidating Information (Details 3) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Condensed Consolidating Statements of Cash Flows
Net cash provided by (used in) operating activities	$ 164,378	$ 249,224	$ 708,297	$ 297,991
Net cash provided by (used in) investing activities	(71,571)	(1,669,035)	(125,274)	(1,696,212)
Net cash provided by (used in) financing activities	(38,418)	1,221,912	(470,596)	1,162,656
Increase (decrease) in cash and equivalents	54,389	(197,899)	112,427	(235,565)
Cash and equivalents at beginning of period	419,401	357,490	361,363	395,156
Cash and equivalents at end of period	473,790	159,591	473,790	159,591
Reportable legal entity | Parent
Condensed Consolidating Statements of Cash Flows
Net cash provided by (used in) operating activities			306,941	258,952
Net cash provided by (used in) investing activities			(35,100)	(1,692,967)
Net cash provided by (used in) financing activities			(126,984)	1,188,074
Increase (decrease) in cash and equivalents			144,857	(245,941)
Cash and equivalents at beginning of period			265,313	320,866
Cash and equivalents at end of period	410,170	74,925	410,170	74,925
Reportable legal entity | Guarantors
Condensed Consolidating Statements of Cash Flows
Net cash provided by (used in) operating activities			400,910	80,298
Net cash provided by (used in) investing activities			(82,737)	15,023
Net cash provided by (used in) financing activities			(347,111)	(85,774)
Increase (decrease) in cash and equivalents			(28,938)	9,547
Cash and equivalents at beginning of period			81,690	61,148
Cash and equivalents at end of period	52,752	70,695	52,752	70,695
Reportable legal entity | Combined Non-Guarantors
Condensed Consolidating Statements of Cash Flows
Net cash provided by (used in) operating activities			(4,302)	(41,245)
Net cash provided by (used in) investing activities			(12,796)	(16,740)
Net cash provided by (used in) financing activities			13,606	58,814
Increase (decrease) in cash and equivalents			(3,492)	829
Cash and equivalents at beginning of period			14,360	13,142
Cash and equivalents at end of period	$ 10,868	$ 13,971	10,868	13,971
Consolidating Adjustments
Condensed Consolidating Statements of Cash Flows
Net cash provided by (used in) operating activities			4,748	(14)
Net cash provided by (used in) investing activities			5,359	(1,528)
Net cash provided by (used in) financing activities			$ (10,107)	$ 1,542