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Supplemental Cash Flow Information	12 Months Ended
Supplemental Cash Flow Information	Dec. 31, 2013
Supplemental Cash Flow Information [Abstract]
Supplemental Cash Flow Information	SUPPLEMENTAL CASH FLOW INFORMATION Estimated federal taxes paid totaled $0, $3,000,000 and $0 for the years ended December 31, 2014, 2013 and 2012, respectively. At December 31, 2013, prepaid expenses and other current assets included federal and state income taxes receivable totaling $3,251,000. Cash paid for state income taxes totaled $172,000, $516,000 and $771,000 for the years ended December 31, 2014, 2013 and 2012, respectively. Foreign taxes withheld totaled $5,159,000, $4,605,000 and $11,890,000 for the years ended December 31, 2014, 2013 and 2012. Refer to Note 6 to these notes to consolidated financial statements for information regarding noncash investing activity related to the investment in patent portfolios for the periods presented. Cash flows from financing activities for the year ended December 31, 2012 exclude $504,000 of accrued distributions payable to noncontrolling interests.