Goodwill and Intangible Assets (Details - Other Details) (USD $)	3 Months Ended								12 Months Ended
	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2010	Sep. 30, 2010	Jun. 30, 2010	Mar. 31, 2010	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Goodwill And Intangible Assets Other Details [Abstract]
Amortization during the period									$ (44,848,000)	$ (68,554,000)	$ (40,300,000)
Amortization of acquisition costs of acquired entity									8,400,000	37,100,000	46,400,000
Amortization of intangible assets	$ 8,900,000	$ 9,500,000	$ 9,200,000	$ 8,800,000	$ 8,800,000	$ 10,000,000	$ 7,800,000	$ 4,800,000	$ 36,405,000	$ 31,461,000	$ (6,133,000)