Cash and Cash Equivalents (Tables)

12 Months Ended

Dec. 31, 2012

Cash and Cash Equivalents [Abstract]

Schedule of Cash and Cash Equivalents [Table Text Block]

A summary of cash and cash equivalents follows (in thousands):

	December 31,
	2012		2011
Cash	$	404,158	$	580,047
Money market funds	50,055		215
	$	454,213	$	580,262