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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2018
Accounting Policies [Abstract] |
Schedule of Accounts, Notes, Loans and Financing Receivable | The following table summarizes the changes in the allowances for doubtful accounts and sales adjustments:
| Years Ended December 31,
| 2018 |  | 2017 |  | 2016
Balance at beginning of year | $ | 5,427 |  |  | $ | 3,396 |  |  | $ | 1,640 |
Provisions for losses - accounts receivable | 2,286 |  |  | 4,110 |  |  | 4,484 |
Collection of accounts previously written off | — |  |  | — |  |  | — |
Deductions for accounts charged off or credits issued | (3,066 | ) |  | (2,079 | ) |  | (2,728 | )
Balance at end of year | $ | 4,647 |  |  | $ | 5,427 |  |  | $ | 3,396 |
Schedule of New Accounting Pronouncements and Changes in Accounting Principles | We adjusted our consolidated financial statements from amounts previously reported due to the adoption of the new standard. Select unaudited condensed consolidated statement of income line items, which reflect the adoption of the new standard, are as follows (in thousands, except per share data):
|  | December 31, 2017 |  | December 31, 2016
|  | As Reported |  | Adjustments |  | As Adjusted |  | As Reported |  | Adjustments |  | As Adjusted
Statement of Income: |  |  |  |  |  |  |  |  |  |  |  |
Software licenses and royalties |  | $ | 75,694 |  |  | $ | 10,548 |  |  | $ | 86,242 |  |  | $ | 74,306 |  |  | $ | 9,427 |  |  | $ | 83,733 |
Subscriptions |  | 173,510 |  |  | (1,334 | ) |  | 172,176 |  |  | 142,704 |  |  | (47 | ) |  | 142,657 |
Software services |  | 187,149 |  |  | (6,689 | ) |  | 180,460 |  |  | 174,804 |  |  | (3,156 | ) |  | 171,648 |
Maintenance |  | 361,569 |  |  | (2,250 | ) |  | 359,319 |  |  | 322,969 |  |  | (1,971 | ) |  | 320,998 |
Appraisal services |  | 25,023 |  |  | — |  |  | 25,023 |  |  | 26,287 |  |  | — |  |  | 26,287 |
Hardware and other |  | 17,717 |  |  | (38 | ) |  | 17,679 |  |  | 14,973 |  |  | (416 | ) |  | 14,557 |
Total revenues |  | 840,662 |  |  | 237 |  |  | 840,899 |  |  | 756,043 |  |  | 3,837 |  |  | 759,880 |
Selling, general and administrative expenses |  | 176,974 |  |  | (1,060 | ) |  | 175,914 |  |  | 167,161 |  |  | (1,985 | ) |  | 165,176 |
Amortization of customer and trade name intangibles |  | 13,912 |  |  | (531 | ) |  | 13,381 |  |  | 13,731 |  |  | (529 | ) |  | 13,202 |
Operating income |  | 160,930 |  |  | 1,828 |  |  | 162,758 |  |  | 131,305 |  |  | 6,351 |  |  | 137,656 |
Income tax (benefit) provision |  | (2,317 | ) |  | (3,798 | ) |  | (6,115 | ) |  | 19,450 |  |  | 2,507 |  |  | 21,957 |
Net income |  | $ | 163,945 |  |  | $ | 5,626 |  |  | $ | 169,571 |  |  | $ | 109,857 |  |  | $ | 3,844 |  |  | $ | 113,701 |
Earnings per common share: |  |  |  |  |  |  |  |  |  |  |  |
Basic |  | $ | 4.40 |  |  |  |  | $ | 4.55 |  |  | $ | 3.01 |  |  |  |  | $ | 3.12 |
Diluted |  | $ | 4.18 |  |  |  |  | $ | 4.32 |  |  | $ | 2.87 |  |  |  |  | $ | 2.92 |
Select condensed consolidated balance sheet line items, which reflect the adoption of the new standard, are as follows (in thousands):
| December 31, 2017
| As Reported |  | Adjustments |  | As Adjusted
Balance Sheet: |  |  |  |  |
Accounts receivable | $ | 227,127 |  |  | $ | 19,061 |  |  | $ | 246,188 |
Prepaid expenses | 27,252 |  |  | 4,954 |  |  | 32,206 |
Accounts receivable, long-term | 7,536 |  |  | 4,571 |  |  | 12,107 |
Other intangibles, net | 236,444 |  |  | (6,827 | ) |  | 229,617 |
Total assets | 1,589,592 |  |  | 21,759 |  |  | 1,611,351 |
Deferred revenue | 309,461 |  |  | (10,848 | ) |  | 298,613 |
Deferred income taxes | 38,914 |  |  | 7,965 |  |  | 46,879 |
Retained earnings | 599,821 |  |  | 24,642 |  |  | 624,463 |
Total liabilities and shareholders' equity | $ | 1,589,592 |  |  | $ | 21,759 |  |  | $ | 1,611,351 |

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