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Deferred Policy Acquisition Costs (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2010
Movement Analysis of Deferred Policy Acquisition Costs [Roll Forward] |  |  |
Balance, beginning of year | $ 171,430 | $ 170,579 | $ 175,866
Policy acquisition costs deferred | 492,268 | 482,572 | 500,278
Amortization | (477,788) | (481,721) | (505,565)
Balance, end of year | $ 185,910 | $ 171,430 | $ 170,579

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- Definition Additions during the period in (a) capitalized policy acquisition costs, and (b) capitalized present value of future profits (also known as PVFP). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section S99 -Paragraph 2 -Subparagraph (2) -URI http://asc.fasb.org/extlink&oid=6784649&loc=d3e569990-122904 + Details
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- Definition Amount of deferred policy acquisition costs and capitalized present value of the future profits (PVFP) expensed. Acquisition costs are costs that are related directly to the successful acquisition of new or renewal insurance contracts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 20 -Section S99 -Paragraph 2 -Subparagraph (2) -URI http://asc.fasb.org/extlink&oid=6784649&loc=d3e569990-122904 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6967983&loc=d3e11264-158415 + Details
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- Definition Carrying (unamortized) amount as of the balance sheet date of deferred policy acquisition costs and value of business acquired (also called present value of future profits). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.7) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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