XML 171 R98.htm IDEA: XBRL DOCUMENT v3.3.1.900
Components of Valuation and Qualifying Accounts (Detail) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Allowance For Doubtful Accounts And Unbilled Services      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of period $ 144,825 $ 109,273 $ 94,048
Charged to Expense 15,564 18,252 13,335
Charged to Other Accounts [1] 42,134 35,423 20,463
Deductions [2] 16,769 18,123 18,573
Balance at End of Period 185,754 144,825 109,273
Valuation Allowance of Deferred Tax Assets      
Valuation and Qualifying Accounts Disclosure [Line Items]      
Balance at Beginning of period 14,442 10,201 1,939
Charged to Expense   4,241 8,262
Deductions [2] 1,275    
Balance at End of Period $ 13,167 $ 14,442 $ 10,201
[1] Includes estimated provision for unbilled services recorded as a reduction to revenues (i.e., fee, rate and other adjustments).
[2] Includes estimated direct write-offs of uncollectible and unrealizable accounts receivable.