| 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: 
|  |  
|  |  |  |  |  |  |  |  |  |  |  |  |  
| (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: 
|  |  
|  |  |  |  |  |  |  |  |  |  |  |  |  
| (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: 
|  |  
|  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  
|   |   | 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 | 
 |  |