Comprehensive Income (Loss) (Components Of Total Comprehensive Income (Loss)) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Comprehensive Income (Loss) [Abstract]
Net income, including noncontrolling interests	$ 45,440	$ 42,109	$ 111,966	$ 68,744
Foreign currency translation gain	(2,838)	(1,416)	1,314	699
Unrealized loss on hedges, net	12,680	20,970	(1,122)	10,403
Other comprehensive income	9,842	19,554	192	11,102
Total comprehensive income	55,282	61,663	112,158	79,846
Less comprehensive income applicable to noncontrolling interests	(789)	(786)	(1,578)	(1,554)
Total comprehensive income applicable to Helix	54,493	60,877	110,580	78,292
Preferred stock dividends	(10)	(10)	(20)	(20)
Total comprehensive income applicable to Helix common shareholders	$ 54,483	$ 60,867	$ 110,560	$ 78,272