Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Net earnings	$ 113,430	$ 385,405	$ 66,768
Other comprehensive income, net of tax of $(4), $4,528 and $6,292 for the years ended December 31, 2011, 2010 and 2009, respectively:
Unrealized changes in fair value of cash flow hedges	(3,116)	(3,276)	2,118
Unrealized changes in fair value of available for sale securities	(117)	117
Realized losses on cash flow hedges reclassified from AOCI into earnings	3,040
Amortization of realized losses and unrealized changes in fair value of discontinued cash flow hedges		10,721	10,146
Foreign currency translation adjustment	(331)	6	1,786
Total other comprehensive (loss) income	(524)	7,568	14,050
Comprehensive income	$ 112,906	$ 392,973	$ 80,818