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Organization and Basis of Presentation Organization and Basis of Presentation (Tables) | 3 Months Ended
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Dec. 31, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract] |
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 |

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