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Comprehensive Income (Details) (USD $) In Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011	Jun. 30, 2010
Reconciliation of net income to comprehensive income
Net income	$ 51,048	$ 24,559	$ 82,823	$ 54,543
Other comprehensive income:
Increase (decrease) in net unrealized gain on CWH and Five Star investments	(6,727)	(1,667)	(3,183)	(1,715)
Increase in share of investees other comprehensive income	39		43
Comprehensive income	$ 44,360	$ 22,892	$ 79,683	$ 52,828

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