XML 17 R46.htm IDEA: XBRL DOCUMENT v3.2.0.727
Fair Value Measurements - Schedule of Fair Value Information for Financial Assets and Liabilities Carried on Balance Sheet (Detail) - USD ($)
$ in Thousands
Jun. 30, 2015
Dec. 31, 2014
Financial Assets:    
Limited partnership investments $ 22,716 $ 2,550
ADC Arrangement classified as real estate investment 6,285 2,888
Portion at Other than Fair Value Measurement [Member]    
Financial Assets:    
Limited partnership investments 19,987  
ADC Arrangement classified as real estate investment 6,204 2,835
Financial Liabilities:    
Total long-term debt 134,441 136,322
Portion at Other than Fair Value Measurement [Member] | Senior Notes [Member]    
Financial Liabilities:    
Total long-term debt 41,828 42,955
Portion at Other than Fair Value Measurement [Member] | Convertible Senior Notes [Member]    
Financial Liabilities:    
Total long-term debt 92,613 93,367
Portion at Other than Fair Value Measurement [Member] | (Level 2) [Member]    
Financial Liabilities:    
Total long-term debt 41,828 42,955
Portion at Other than Fair Value Measurement [Member] | (Level 2) [Member] | Senior Notes [Member]    
Financial Liabilities:    
Total long-term debt 41,828 42,955
Portion at Other than Fair Value Measurement [Member] | (Level 3) [Member]    
Financial Assets:    
Limited partnership investments 19,987  
ADC Arrangement classified as real estate investment 6,204 2,835
Financial Liabilities:    
Total long-term debt 92,613 93,367
Portion at Other than Fair Value Measurement [Member] | (Level 3) [Member] | Convertible Senior Notes [Member]    
Financial Liabilities:    
Total long-term debt $ 92,613 $ 93,367