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Reserve for Loss and Loss Expense | 3 Months Ended
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Mar. 31, 2022
Insurance Loss Reserves [Abstract] |
Reserve for Loss and Loss Expense | Reserve for Loss and Loss Expense The table below provides a roll forward of reserve for loss and loss expense for beginning and ending reserve balances:
|  | Quarter ended March 31,
($ in thousands) |  | 2022 |  | 2021
Gross reserve for loss and loss expense, at beginning of period |  | $ | 4,580,903 |  |  | 4,260,355 |
Less: reinsurance recoverable on unpaid loss and loss expense, at beginning of period |  | 578,641 |  |  | 554,269 |
Net reserve for loss and loss expense, at beginning of period |  | 4,002,262 |  |  | 3,706,086 |
Incurred loss and loss expense for claims occurring in the: |  |  |  |
Current year |  | 508,299 |  |  | 447,170 |
Prior years |  | (14,063) |  |  | (33,769) |
Total incurred loss and loss expense |  | 494,236 |  |  | 413,401 |
Paid loss and loss expense for claims occurring in the: |  |  |  |
Current year |  | 91,292 |  |  | 80,158 |
Prior years |  | 312,926 |  |  | 243,687 |
Total paid loss and loss expense |  | 404,218 |  |  | 323,845 |
Net reserve for loss and loss expense, at end of period |  | 4,092,280 |  |  | 3,795,642 |
Add: Reinsurance recoverable on unpaid loss and loss expense, at end of period |  | 552,111 |  |  | 564,546 |
Gross reserve for loss and loss expense at end of period |  | $ | 4,644,391 |  |  | 4,360,188 |
Prior year reserve development in First Quarter 2022 was favorable by $14.1 million, consisting of $20.0 million of favorable casualty reserve development, partially offset by $5.9 million of unfavorable property reserve development. The favorable casualty reserve development included $10.0 million in our workers compensation line of business, $5.0 million in our general liability line of business, and $5.0 million in our bonds line of business. Prior year reserve development in First Quarter 2021 was favorable by $33.8 million, consisting of $35.0 million of favorable casualty reserve development, partially offset by $1.2 million of unfavorable property reserve development. The favorable casualty reserve development included $15.0 million in our workers compensation line of business, $15.0 million in our general liability line of business, and $5.0 million in our Excess and Surplus (E&S") casualty lines of business.

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- Definition The entire disclosure for liabilities related to future policy benefits and unpaid claims and claim adjustments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 40 -URI http://asc.fasb.org/subtopic&trid=2560295 + Details
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