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Debt Securities - Summary of Continuous Unrealized Loss Positions (Details) $ in Thousands	Sep. 30, 2015 USD ($)
Schedule of Available-for-sale Securities [Line Items]
Continuous unrealized loss position, Less than 12 months, Unrealized Loss	$ (4,222)
Continuous unrealized loss position, 12 months or More, Unrealized Loss	(1,152)
Commercial Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Continuous unrealized loss position, Less than 12 months, Unrealized Loss	(4,222)
Continuous unrealized loss position, 12 months or More, Unrealized Loss	(1,152)
Estimated Fair Value [Member]
Schedule of Available-for-sale Securities [Line Items]
Continuous unrealized loss position, Less than 12 months, Fair Value	239,715
Continuous unrealized loss position, 12 months or More, Fair Value	6,315
Estimated Fair Value [Member] | Commercial Mortgage Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Continuous unrealized loss position, Less than 12 months, Fair Value	239,715
Continuous unrealized loss position, 12 months or More, Fair Value	$ 6,315

X

- Definition

Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for twelve months or longer.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 320



-SubTopic 10



-Section 50



-Paragraph 6



-Subparagraph (a)(2)



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Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale that have been in a continuous loss position for less than twelve months.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 320



-SubTopic 10



-Section 50



-Paragraph 6



-Subparagraph (a)(2)



-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563



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This item represents the aggregate fair value of investments in debt and equity securities categorized neither as held-to-maturity nor trading securities that have been in a continuous unrealized loss position for less than twelve months.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 320



-SubTopic 10



-Section 50



-Paragraph 7



-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27337-111563



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+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 320



-SubTopic 10



-Section 50



-Paragraph 6



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-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27290-111563



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



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