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Supplementary Data on Cash Flows (Tables) | 12 Months Ended
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Dec. 31, 2018
Supplemental Cash Flow Elements [Abstract] |
Reconciliation of net income to net cash provided by operating activities | A reconciliation of net income to net cash provided by operating activities as presented in the Consolidated Statements of Cash Flows is as follows:
($ in thousands) |  | Years Ended December 31,
|  | 2018 |  | 2017 |  | 2016
Cash flows from operating activities |  |  |  |  |  |  |  |  |
Net income |  | $ | 18,343 |  |  | $ | 169,459 |  |  | $ | 83,765 |
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |  |  |  |  |  |  |
Net investment (gains) losses |  | 12,543 |  |  | 3,406 |  |  | (4,123 | )
Increase in accrued investment income |  | 4,449 |  |  | (3,404 | ) |  | (2,208 | )
Increase (decrease) in accrued expenses |  | (1,088 | ) |  | (2,240 | ) |  | 4,378 |
Depreciation and amortization |  | 7,357 |  |  | 6,615 |  |  | 6,896 |
Increase in insurance liabilities |  | 197,472 |  |  | 154,061 |  |  | 176,315 |
Increase in premium receivables |  | (10,026 | ) |  | (12,917 | ) |  | (11,496 | )
Increase in deferred policy acquisition costs |  | (783 | ) |  | (7,967 | ) |  | (15,859 | )
(Increase) decrease in reinsurance recoverables |  | (21,317 | ) |  | 11 |  |  | (481 | )
Increase (decrease) in income tax liabilities |  | 5,971 |  |  | (21,291 | ) |  | (1,293 | )
Other |  | (12,033 | ) |  | (29,147 | ) |  | (24,461 | )
Total adjustments |  | 182,545 |  |  | 87,127 |  |  | 127,668 |
Net cash provided by operating activities |  | $ | 200,888 |  |  | $ | 256,586 |  |  | $ | 211,433 |

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