Shareholders' Equity (Tables)

12 Months Ended

Dec. 31, 2011

Stockholders' Equity Note [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block]

					Foreign		Accumulated
	Net unrealized				currency		other
	investment		Cash flow		translation		comprehensive
	gains (losses)		hedge gain		adjustment		income
Balance at December 31, 2008	$	11,715	$	(5,220)	$	21,041	$	27,536
Other comprehensive income - 2009		89,694		5,220		1,516		96,430
Cumulative effect of accounting change
(other-than-temporary impairments in investments)		(4,301)		0		0		(4,301)
Balance at December 31, 2009		97,108		0		22,557		119,665
Other comprehensive income - 2010		(14,435)		0		(8,044)		(22,479)
Balance at December 31, 2010		82,673		0		14,513		97,186
Other comprehensive income - 2011		130,441		0		32		130,473
Balance at December 31, 2011	$	213,114	$	0	$	14,545	$	227,659