During the year ended December 31, 2016 we recorded $15.4 million of adverse prior accident year development driven by Healthcare but offset in part by other businesses. Healthcare recorded $40.7 million of adverse prior accident year development (Healthcare Development Impact), including $10.0 million in the first quarter, $20.0 million in the second quarter, $1.1 million in the third quarter, and $9.6 million in the fourth quarter. The full year development was driven by the extended care and complex risks sub-lines, and to a lesser extent, two large claims developments within the managed care errors and omissions sub-line related to unexpected outcomes from mediation and extended costs associated with claim defense. Extended care provides medical malpractice and general liability insurance for extended care facilities, including assisted living, memory care and continuing care facilities. Complex risks provides professional liability coverage to hospitals, physicians, and physician groups as well as physicians' extended reporting period coverage. The complex risks development was heavily influenced by large claim activity.
Net income attributable to OneBeacon's common shareholders was $36.8 million for 2015, compared to $32.9 million in 2014. Pre-tax underwriting income was $43.5 million for 2015, reflecting a combined ratio of 96.3%, compared to a pre-tax underwriting loss of $20.5 million for 2014, reflecting a combined ratio of 101.7%. The increase in pre-tax underwriting results was driven by the significant impact of loss and LAE recorded in the fourth quarter of 2014 totaling $109.2 million, as noted below in "2014 Fourth Quarter Reserve Increase." The 2015 pre-tax underwriting results were driven by solid results in most of our underwriting operating segments, but were partially offset by unfavorable results in our Entertainment, Programs, Inland Marine and Ocean Marine businesses. Pre-tax net investment results were $10.8 million in 2015, representing a 0.6% total return on average invested assets, compared to $83.8 million in 2014, representing a 3.5% total return on average invested assets, with the decline from 2014 being driven by other investments generating significantly lower returns in energy exposed private equity funds in 2015 than in 2014 and negative valuation adjustments on surplus notes, lower equity returns, and decreased returns for the fixed maturity investment portfolio driven by interest rate movements. In addition, we had a tax benefit in 2015 of $12.9 million compared to a tax benefit of $12.3 million in 2014. The current year tax benefit was driven by the significant unfavorable change in unrealized investment gains in 2015.
The 23.2 point decrease in the loss and LAE ratio, was primarily due to the impact of the 2014 fourth quarter reserve increase which had a 13.8 point unfavorable impact on the 2014 combined ratio as well as the solid results at most of our
Our top tier regulated U.S. insurance operating subsidiary, ASIC, has the ability to pay dividends to its immediate parent without the prior approval of regulatory authorities in an amount set by formula based on the lesser of (i) adjusted net investment income, as defined by statute, or (ii) 10% of statutory surplus, in both cases as most recently reported to regulatory authorities, subject to the availability of earned surplus. Based upon the formula described above, as of December 31, 2016, ASIC has the ability to pay $11.4 million of dividends without prior approval of regulatory authorities. When taking into consideration the rolling 12-month portion of this statutorily-defined calculation, including adjusted net investment income and the timing of dividends paid, we anticipate that ASIC will have the ability to pay dividends of approximately $30.0 million during 2017. As of December 31, 2016, ASIC had $624.8 million of statutory surplus and $69.0 million of earned surplus. During the years ended December 31, 2016 and 2015, ASIC paid $26.5 million and $44.9 million, respectively, of dividends to its immediate parent. During the year ended December 31, 2015, ASIC also redeemed and retired common shares held by its immediate parent at an aggregate price of $66.0 million.
common share issuances and repurchases and dividends paid to shareholders are all activities that do not change insurance float but that can meaningfully impact operational leverage metrics that are calculated using insurance float.
Net cash flows provided from operations in 2016 decreased by $144.6 million relative to 2015, primarily due to lower collateral received related to our Surety business and amounts received in conjunction with our exited Crop business, as well as resulting from lower premium collections, higher payments related to various incentive programs, and a large claim payment at the end of 2016. We expect to recover most of the large claim payment in 2017 by a recovery under our reinsurance and corporate insurance policies that had not been received by OneBeacon as of December 31, 2016. Net cash flows provided from continuing operations in 2015 increased $40.4 million relative to 2014, primarily due to increased cash collateral received related to our Surety business and lower incentive payments which more than offset increased loss and LAE payments relative to the prior year.
During 2014, we made payments with respect to our long-term incentive compensation plans totaling $10.8 million, in cash or by deferral into certain of our non-qualified compensation plans. These payments were made primarily with respect to 106,225 performance units and 142,138 performance shares for the 2011-2013 performance cycle.
Excludes the carrying value of $12.3 million and $14.7 million as of December 31, 2016 and 2015, respectively, associated with a tax advantaged federal affordable housing development fund accounted for using the proportional amortization method.