| Schedule of New Accounting Pronouncements and Changes in Accounting Principles | 
The adoption of Topic 606 resulted in the following changes to our opening balance sheet: 
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(dollars in thousands)  | 
Balance at September 30, 2018  | 
   | 
Adjustments due to adoption of new standard  | 
   | 
Opening balance at October 1, 2018  | 
 
Assets  | 
   | 
   | 
   | 
   | 
   | 
 
Accounts receivable - unbilled  | 
$  | 
31,536  | 
 
  | 
   | 
$  | 
35,414  | 
 
  | 
   | 
$  | 
66,950  | 
 
  | 
 
Deferred income taxes  | 
6,834  | 
 
  | 
   | 
(6,625  | 
)  | 
   | 
209  | 
 
  | 
 
Liabilities and shareholders' equity  | 
   | 
   | 
   | 
   | 
   | 
 
Deferred revenue - current  | 
51,182  | 
 
  | 
   | 
(11,767  | 
)  | 
   | 
39,415  | 
 
  | 
 
Deferred income taxes - long-term  | 
26,377  | 
 
  | 
   | 
7,074  | 
 
  | 
   | 
33,451  | 
 
  | 
 
Retained earnings  | 
633,281  | 
 
  | 
   | 
32,929  | 
 
  | 
   | 
666,210  | 
 
  | 
 
Noncontrolling interests  | 
2,552  | 
 
  | 
   | 
553  | 
 
  | 
   | 
3,105  | 
 
  | 
 
  
 
The effect on our balance sheet would have been as follows: 
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(dollars in thousands)  | 
Balance at December 31, 2018 as reported  | 
   | 
Adjustments due to adoption of new standard  | 
   | 
Balance at December 31, 2018 under previous accounting guidance  | 
 
Assets  | 
   | 
   | 
   | 
   | 
   | 
 
Accounts receivable - unbilled  | 
$  | 
124,385  | 
 
  | 
   | 
$  | 
(34,233  | 
)  | 
   | 
$  | 
90,152  | 
 
  | 
 
Deferred income taxes  | 
209  | 
 
  | 
   | 
6,743  | 
 
  | 
   | 
6,952  | 
 
  | 
 
Liabilities and shareholders' equity  | 
   | 
   | 
   | 
   | 
   | 
 
Deferred revenue - current  | 
37,231  | 
 
  | 
   | 
12,521  | 
 
  | 
   | 
49,752  | 
 
  | 
 
Deferred income taxes - long-term  | 
49,617  | 
 
  | 
   | 
(6,764  | 
)  | 
   | 
42,853  | 
 
  | 
 
Accumulated other comprehensive loss  | 
(42,673  | 
)  | 
   | 
825  | 
 
  | 
   | 
(41,848  | 
)  | 
 
Retained earnings  | 
664,332  | 
 
  | 
   | 
(33,349  | 
)  | 
   | 
630,983  | 
 
  | 
 
Noncontrolling interests  | 
2,782  | 
 
  | 
   | 
(723  | 
)  | 
   | 
2,059  | 
 
  | 
 
  
 
Our balances for cash, cash equivalents and restricted cash are as follows: 
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   | 
   | 
Balance as of  | 
 
(dollars in thousands)  | 
   | 
December 31, 2018  | 
   | 
September 30, 2018  | 
   | 
December 31, 2017  | 
   | 
September 30, 2017  | 
 
Cash and cash equivalents  | 
   | 
$  | 
54,736  | 
 
  | 
   | 
$  | 
349,245  | 
 
  | 
   | 
$  | 
196,905  | 
 
  | 
   | 
$  | 
166,252  | 
 
  | 
 
Restricted cash (recorded within "other current assets")  | 
   | 
7,358  | 
 
  | 
   | 
7,314  | 
 
  | 
   | 
13,597  | 
 
  | 
   | 
13,475  | 
 
  | 
 
Cash, cash equivalents and restricted cash  | 
   | 
$  | 
62,094  | 
 
  | 
   | 
$  | 
356,559  | 
 
  | 
   | 
$  | 
210,502  | 
 
  | 
   | 
$  | 
179,727  | 
 
  | 
 
  
 
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