Disclosure regarding factors used to determine that the impairment of securities not categorized as either held-to-maturity securities or trading securities (hence equal to available for sale securities) where cost exceeds fair value is not an other than temporary impairment (OTTI). This item contains disclosure of the number of investment positions in the available-for-sale investments determined to be temporarily impaired.

+ References+ Details

The cash inflow associated with the sale of debt and equity securities classified as available-for-sale securities.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 115

-Paragraph 18

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 15

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 16

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 320

-SubTopic 10

-Section 45

-Paragraph 11

-URI http://asc.fasb.org/extlink&oid=6871852&loc=d3e26853-111562

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 95

-Paragraph 16

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 7: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 12

-Subparagraph (a),(b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3179-108585

+ Details

Investment Securities - Narrative (Details) (USD $)							3 Months Ended		6 Months Ended
Investment Securities - Narrative (Details) (USD $)	Jun. 30, 2013 position	Dec. 31, 2012 position	Jun. 30, 2013 External Credit Rating, BBB- Rating [Member][Member] [Member] position	Jun. 30, 2013 A Minus Rating position	Dec. 31, 2012 A Minus Rating position	Jun. 30, 2013 External Credit Rating, A Rating [Member] [Member] position	Jun. 30, 2013 Investment Securities [Member]	Jun. 30, 2012 Investment Securities [Member]	Jun. 30, 2013 Investment Securities [Member]	Jun. 30, 2012 Investment Securities [Member]	Jun. 30, 2013 Investment Securities [Member] position	Dec. 31, 2012 Investment Securities [Member] position	Jun. 30, 2013 Fixed Interest Rate [Member] Corporate Debt Securities [Member]	Dec. 31, 2012 Fixed Interest Rate [Member] Corporate Debt Securities [Member]	Jun. 30, 2013 Fixed Interest Rate [Member] Corporate Debt Securities [Member] External Credit Rating, BBB- Rating [Member][Member] [Member]	Dec. 31, 2012 Fixed Interest Rate [Member] Asset-backed Securities [Member]	Jun. 30, 2013 Floating Interest Rate [Member] Corporate Debt Securities [Member]	Dec. 31, 2012 Floating Interest Rate [Member] Corporate Debt Securities [Member]	Jun. 30, 2013 Floating Interest Rate [Member] Asset-backed Securities [Member]	Dec. 31, 2012 Floating Interest Rate [Member] Asset-backed Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Number of securities in Loss Position	40	17	1	3	1	1
Available-for-sale Securities, Unrealized Losses											$ (17,256,000)	$ (23,767,000)	$ (133,000)	$ 0	$ (22,000)	$ 0	$ (37,000)	$ 0	$ (328,000)	$ (36,000)
Proceeds from sale of available-for-sale investment securities							155,600,000	5,028,000	170,614,000	5,000,000
Available-for-sale, Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of securities in unrealized loss position greater than twelve months											8	9
Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Aggregate Losses	(15,792,000)	(23,521,000)											0				0		(101,000)	(9,000)
Trading securities weighted-average yield																			4.28%	4.29%
Available-for-sale Securities, Gross Realized Gains							$ 3,100,000		$ 3,100,000	$ 0
Available-for-sale securities in a loss position for more than 12 months, qualitative disclosure, percent of amortized cost											89.70%