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Statutory Information and Restrictions (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2012 | Sep. 30, 2012 | Jun. 30, 2012 | Mar. 31, 2012 | Dec. 31, 2011 | Sep. 30, 2011 | Jun. 30, 2011 | Mar. 31, 2011 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
Reconciliations of statutory capital and surplus |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statutory capital and surplus of insurance subsidiaries | $ 809,241 |  |  |  | $ 754,153 |  |  |  |  |  |  |  | $ 809,241 | $ 754,153 |
Increase (decrease) due to: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred policy acquisition costs | 245,355 |  |  |  | 196,885 |  |  |  |  |  |  |  | 245,355 | 196,885 |
Difference in policyholder reserves | 80,459 |  |  |  | 67,582 |  |  |  |  |  |  |  | 80,459 | 67,582 |
Goodwill | 47,396 |  |  |  | 47,396 |  |  |  |  |  |  |  | 47,396 | 47,396 |
Liability for postretirement benefits other than pensions | (1,130) |  |  |  | (2,862) |  |  |  |  |  |  |  | (1,130) | (2,862) |
Investment fair value adjustments on fixed maturities | 227,060 |  |  |  | 651,071 |  |  |  |  |  |  |  | 227,060 | 651,071 |
Difference in investment reserves | 111,983 |  |  |  | 101,276 |  |  |  |  |  |  |  | 111,983 | 101,276 |
Federal income tax liability | (188,426) |  |  |  | (317,875) |  |  |  |  |  |  |  | (188,426) | (317,875) |
Net funded status of pension and other postretirement benefit obligations | (18,217) |  |  |  | (23,862) |  |  |  |  |  |  |  | (18,217) | (23,862) |
Non-admitted assets and other, net | 11,349 |  |  |  | 10,660 |  |  |  |  |  |  |  | 11,349 | 10,660 |
Shareholders' equity (deficit) of parent company and non-insurance subsidiaries | 12,109 |  |  |  | (812) |  |  |  |  |  |  |  | 12,109 | (812) |
Parent company short-term and long-term debt | (237,874) |  |  |  | (237,809) |  |  |  |  |  |  |  | (237,874) | (237,809) |
Total shareholders' equity | 1,099,305 |  |  |  | 1,245,803 |  |  |  | 1,055,353 |  |  |  | 1,099,305 | 1,245,803 | 1,055,353
Reconciliations of statutory net income |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Statutory net income of insurance subsidiaries |  |  |  |  |  |  |  |  |  |  |  |  | 98,905 | 93,299 | 63,986
Net loss of non-insurance companies |  |  |  |  |  |  |  |  |  |  |  |  | (4,583) | (4,726) | (10,164)
Interest expense |  |  |  |  |  |  |  |  |  |  |  |  | (14,236) | (14,249) | (14,007)
Tax benefit of interest expense and other parent company current tax adjustments |  |  |  |  |  |  |  |  |  |  |  |  | 6,030 | 9,308 | 4,603
Combined net income |  |  |  |  |  |  |  |  |  |  |  |  | 86,116 | 83,632 | 44,418
Increase (decrease) due to: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Deferred policy acquisition costs |  |  |  |  |  |  |  |  |  |  |  |  | 17,177 | 16,595 | 8,989
Policyholder benefits |  |  |  |  |  |  |  |  |  |  |  |  | 19,038 | 15,574 | 14,428
Federal income tax expense |  |  |  |  |  |  |  |  |  |  |  |  | (12,735) | (19,843) | (6,639)
Investment reserves |  |  |  |  |  |  |  |  |  |  |  |  | 6,818 | 14,021 | 9,903
Other adjustments, net |  |  |  |  |  |  |  |  |  |  |  |  | (5,521) | (6,113) | (593)
Net income | $ 34,287 | $ 23,599 | $ 25,995 | $ 27,012 | $ 31,826 | $ 32,266 | $ 13,103 | $ 26,671 | $ 32,913 | $ 23,637 | $ (11,851) | $ 25,807 | $ 110,893 | $ 103,866 | $ 70,506

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- Definition Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SAB TOPIC 4.E) -URI http://asc.fasb.org/extlink&oid=27010918&loc=d3e74512-122707 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Staff Accounting Bulletin (SAB) -Number Topic 4 -Section E Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.29-31) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 29, 30, 31 -Article 5 + Details
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