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Investments - Schedule of Amortized Cost and Fair Value on Mortgage-Backed and Asset-Backed Securities (Detail) (USD $) In Thousands, unless otherwise specified	Jun. 30, 2014	Dec. 31, 2013
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	$ 336,579	$ 355,052
Fair Value	335,565	354,440
Mortgage-backed securities [Member] | Agency [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	57,935	64,028
Fair Value	57,737	63,547
Mortgage-backed securities [Member] | Non Agency [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	2,184
Fair Value	2,169
Asset-backed securities [Member] | Auto Loans [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	16,858	14,816
Fair Value	16,907	14,841
Asset-backed securities [Member] | Credit Card Receivables [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	13,478	11,478
Fair Value	13,479	11,425
Asset-backed securities [Member] | Other Receivables [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	4,599	1,180
Fair Value	4,616	1,187
Mortgage-Backed and Asset-Backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Cost or Amortized Cost	95,054	91,502
Fair Value	$ 94,908	$ 91,000

X

- Definition

Amount of investment in debt and equity securities categorized neither as held-to-maturity nor trading.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 25

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=28360136&loc=d3e22054-111558



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 50

-Paragraph 5

-Subparagraph (aa)

-URI http://asc.fasb.org/extlink&oid=27724398&loc=d3e27232-111563



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26610-111562

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X

- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.2)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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