Deferred Policy Acquisition Costs (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2015	Dec. 31, 2014
DeferredPolicyAcquisitionCostsDisclosuresAbstract
Balance, beginning of year	$ 973,512us-gaap_DeferredPolicyAcquisitionCosts	$ 1,114,431us-gaap_DeferredPolicyAcquisitionCosts
Balance, end of year	$ 973,512us-gaap_DeferredPolicyAcquisitionCosts	$ 1,114,431us-gaap_DeferredPolicyAcquisitionCosts

Net amount of deferred policy acquisition costs capitalized on contracts remaining in force as of the balance sheet date.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 16

-Article 12

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 825

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6487548&loc=d3e32546-158582

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 30

-Section 55

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35755678&loc=d3e11446-158418

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 30

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6481648&loc=d3e11198-158413

Reference 5: 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.(a),7)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Article 7

Name:	us-gaap_DeferredPolicyAcquisitionCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant