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Operating Segments Segment Data from Operations (Detail) (USD $)
In Thousands, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Segment Reporting Information [Line Items]                      
Operating loss $ (4,720) $ (4,835) $ (6,715) $ (5,374) $ (4,792) $ (4,790) $ (5,148) $ (4,743) $ (21,644) $ (19,473) $ (21,168)
Interest income 550 572 790 734 736 696 595 899 2,646 2,926 1,424
Equity income (loss) 22,646 (9,866) (18,400) (6,987) (6,829) (3,293) (8,947) (7,448) (12,607) (26,517) 142,457
Net income (loss) 23,967 (19,430) (28,123) (11,939) (10,808) (8,757) (10,137) (9,660) (35,525) (39,362) 110,597
Assets 345,996       374,144       345,996 374,144  
Total Segments
                     
Segment Reporting Information [Line Items]                      
Operating loss                 (15) (10) 0
Interest income                 1,506 1,505 210
Equity income (loss)                 (12,903) (26,980) 142,682
Net income (loss)                 (10,776) (7,915) 135,680
Assets 157,193       154,406       157,193 154,406  
Healthcare [Member]
                     
Segment Reporting Information [Line Items]                      
Operating loss                 0 0 0
Interest income                 0 0 0
Equity income (loss)                 (31,706) (26,544) 121,299
Net income (loss)                 (32,563) (6,660) 114,063
Assets 74,939       83,500       74,939 83,500  
Technology [Member]
                     
Segment Reporting Information [Line Items]                      
Operating loss                 0 0 0
Interest income                 0 0 0
Equity income (loss)                 20,899 (119) 21,454
Net income (loss)                 20,899 (119) 21,478
Assets 69,471       58,753       69,471 58,753  
Penn Mezzanine [Member]
                     
Segment Reporting Information [Line Items]                      
Operating loss                 (15) (10) 0
Interest income                 1,506 1,505 210
Equity income (loss)                 (2,096) (317) (71)
Net income (loss)                 888 (1,136) 139
Assets 12,783       12,153       12,783 12,153  
Other Items
                     
Segment Reporting Information [Line Items]                      
Operating loss                 (21,629) (19,463) (21,168)
Interest income                 1,140 1,421 1,214
Equity income (loss)                 296 463 (225)
Net income (loss)                 (24,749) (31,447) (25,083)
Assets $ 188,803       $ 219,738       $ 188,803 $ 219,738