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Statutory Balances and Accounting Practices | 12 Months Ended
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Dec. 31, 2017
Statutory Balances And Accounting Practices [Abstract] |
Statutory Balances and Accounting Practices | Statutory Balances and Accounting Practices The Insurance Companies prepare their statutory-basis financial statements in conformity with accounting practices prescribed or permitted by the insurance departments of their domiciliary states. Prescribed statutory accounting practices primarily include those published as statements of statutory accounting principles by the National Association of Insurance Commissioners (the "NAIC"), as well as state laws, regulations, and general administrative rules. Permitted statutory accounting practices encompass all accounting practices not so prescribed. As of December 31, 2017, there were no material permitted statutory accounting practices utilized by the Insurance Companies. The following table presents the statutory net income, and statutory capital and surplus of the Insurance Companies, as reported to regulatory authorities:
| Year Ended December 31,
| 2017 |  | 2016 |  | 2015
| (Amounts in thousands)
Statutory net income(1) | $ | 117,376 |  |  | $ | 82,359 |  |  | $ | 123,984 |
Statutory capital and surplus | $ | 1,589,226 |  |  | $ | 1,441,571 |  |  | $ | 1,451,950 |
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(1) | Statutory net income reflects differences from GAAP net income, including changes in the fair value of the investment portfolio as a result of the application of the fair value option.
The Insurance Companies must comply with minimum capital requirements under applicable state laws and regulations. The RBC formula is used by insurance regulators to monitor capital and surplus levels. It was designed to capture the widely varying elements of risks undertaken by writers of different lines of insurance business having differing risk characteristics, as well as writers of similar lines where differences in risk may be related to corporate structure, investment policies, reinsurance arrangements, and a number of other factors. The Company periodically monitors the RBC level of each of the Insurance Companies. As of December 31, 2017, 2016, and 2015, each of the Insurance Companies exceeded the minimum required RBC level, as determined by the NAIC and adopted by the state insurance regulators. None of the Insurance Companies’ RBC ratios were less than 400% of the authorized control level RBC as of December 31, 2017, 2016 and 2015. Generally, an RBC ratio of 200% or less would require some form of regulatory or company action.

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- Definition Statutory Balances And Accounting Practices [Abstract] + References No definition available. + Details
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- Definition Tabular disclosure of how the entity's reporting under GAAP as of the balance sheet date differs from the results based on prescribed and permitted accounting practices of the state or country of domicile in which a relevant statutory filing is made, or differences in results based on the National Association of Insurance Commissioners (NAIC) prescribed practices, or a combination thereof. Describes the accounting practices used and the related monetary effect on statutory surplus, net income, and risk-based capital. If an insurance enterprise's risk-based capital would have triggered a regulatory event had it not used a permitted practice, that fact is disclosed in the financial statements. Permitted statutory accounting practices include practices not prescribed but allowed by the domiciliary state insurance department regulatory authority. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 505 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=6486098&loc=d3e24746-158529 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.23(c)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 505 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=6486098&loc=d3e24790-158529 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 505 -Section 55 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6588579&loc=d3e24938-158530 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 505 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6486098&loc=d3e24708-158529 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 505 -Section 55 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6588579&loc=d3e24959-158530 + Details
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