XML 96 R82.htm IDEA: XBRL DOCUMENT v3.3.1.900
Debt and Financing Arrangements - Summary of Recognized Interest Expense on 2010 Notes and 2006 Notes (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Debt Instrument [Line Items]      
Total interest expense $ 8,902 $ 13,124 $ 15,374
2010 Convertible Senior Subordinated Notes [Member]      
Debt Instrument [Line Items]      
Total interest expense 4,559 9,068 9,898
Credit Facility [Member]      
Debt Instrument [Line Items]      
Total interest expense 4,320 4,033 5,453
2006 Convertible Senior Subordinated Notes [Member]      
Debt Instrument [Line Items]      
Total interest expense $ 23 $ 23 $ 23