Annual report pursuant to Section 13 and 15(d)

SCHEDULE II - Valuation and Qualifying Accounts (Details)

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SCHEDULE II - Valuation and Qualifying Accounts (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Deferred:      
Income tax (expense) benefit from continuing operations $ (30,093) $ 43,667 $ (5,008)
U.S. Federal (61,024) 10,966 12,633
State and local 1,490 4,461 (29,108)
Deferred tax assets on operating loss carryforwards 21,381 17,979  
Allowances for doubtful accounts, deducted from accounts receivable in the balance sheet:      
Valuation And Qualifying Accounts      
Balance at Beginning of Period 3,374 3,399 3,961
Additions Charged to Costs and Expenses 3,231 3,292 4,219
Deductions (2,932) (3,317) (4,781)
Balance at End of Period $ 3,673 3,374 3,399
Valuation allowance on deferred tax assets:      
Valuation And Qualifying Accounts      
Balance at Beginning of Period   815 454,610
Deductions   $ (815) (453,795)
Balance at End of Period     815
Deferred:      
Income tax (expense) benefit from continuing operations     47,200
U.S. Federal     13,500
State and local     33,700
Deferred tax assets on operating loss carryforwards     $ 406,600