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SIGNIFICANT ACCOUNTING POLICIES (Tables)
 12 Months Ended
Dec. 31, 2018
Accounting Policies [Abstract]  
Schedule of reconciliation of the allowance for doubtful accounts
A reconciliation of the beginning and ending balances of the allowance for doubtful accounts is as follows (in thousands):
 
Year Ended December 31,
 
2018
 
2017
 
2016
Balance, beginning of the period
$
675

 
$
1,059

 
$
606

Charges to earnings
880

 
195

 
515

Write-off of uncollectible accounts receivable
(412
)
 
(579
)
 
(62
)
Balance, end of the period
$
1,143

 
$
675

 
$
1,059
Schedule of depreciation period for each asset category
The following table presents the estimated useful lives for each asset category:
Asset Category
Estimated Useful Lives
Land
N/A
Building
34 years
Site Improvements
1 to 15 years
Computer equipment and capitalized software
1 to 5 years
Leasehold improvements
Lesser of asset life or life of lease
Furniture and other equipment
3 to 7 years
Aircraft and automobile
5 to 10 years
Schedule of effect of new accounting pronouncements
The cumulative effect of the changes made to the consolidated January 1, 2018 balance sheet for the adoption of ASC Topic 606 were as follows (in thousands):
 
December 31,
2017
 
Adjustments
due to
ASC Topic 606
 
January 1,
2018
Assets:
 
 
 
 
 
Prepaid and other current assets
$
11,881

 
$
1,903

 
$
13,784

Deferred income tax assets
20,156

 
(530
)
 
19,626

 
 
 
 
 
 
Shareholders' equity:
 
 
 
 
 
Accumulated deficit
$
(708,354
)
 
$
1,373

 
$
(706,981
)
The impact of adoption on the consolidated income statement and balance sheet for the period ended December 31, 2018 was as follows (in thousands):
 
Year Ended December 31, 2018
 
As Reported
 
Balances without
adoption of
ASC Topic 606
 
Effect of Change
Revenue
$
764,865

 
$
762,739

 
$
2,126

 
 
 
 
 
 
Costs and expenses:
 
 
 
 
 
Income tax benefit
65,575

 
66,182

 
(607
)
 
 
 
 
 
 
Net income from continuing operations
$
109,319

 
$
107,800

 
$
1,519

 
December 31, 2018
 
As Reported
 
Balances without
adoption of
ASC Topic 606
 
Effect of Change
Assets:
 
 
 
 
 
Prepaid and other current assets
$
16,428

 
$
11,627

 
$
4,801

Deferred income tax assets
79,289

 
79,819

 
(530
)
 
 
 
 
 
 
Shareholders' equity:
 
 
 
 
 
Accumulated deficit
$
(610,482
)
 
$
(614,753
)
 
$
4,271