AFS securities in loss position at period-end, change in unrealized loss.

No definition available.

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- Definition

Auction rate securities held at fair value

+ References

No definition available.

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- Definition

Cost of investment in equity securities measured at fair value with change in fair value recognized in net income (FV-NI). Excludes equity method investments and investments in equity securities without readily determinable fair values.

+ References

No definition available.

+ Details

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- Definition

Amount of investment in equity securities measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

No definition available.

+ Details

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- Definition

Amount of unrealized gain on investment in equity securities measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

No definition available.

+ Details

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- Definition

Amount of investment in equity securities without readily determinable fair values.

+ References

No definition available.

+ Details

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- Definition

Fair value of securities on other-than-temporary impairment watch list.

+ References

No definition available.

+ Details

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- Definition

The fair value of investment securities pledged for public funds, repurchase agreements, and borrowings

+ References

No definition available.

+ Details

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- Definition

The number of investments in a single issuer that exceed 10% of stockholder's equity, excluding obligations of various government-sponsored enterprises such as FNMA, FHLB, and FHLMC.

+ References

No definition available.

+ Details

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- Definition

The percent of decrease in the fair value of securities below amortized cost requiring a review for possible other-than-temporary impairment.

+ References

No definition available.

+ Details

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- Definition

No investment in a single issuer exceeds this percentage of stockholder's equity, other than obligations of various government-sponsored enterprises such as FNMA, FHLB, and FHLMC.

+ References

No definition available.

+ Details

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- Definition

U.S. Treasury inflation protected securities held at fair value

+ References

No definition available.

+ Details

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- Definition

Line items represent reporting concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Article 12
-Section 12
-Sentence Column A

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- Definition

Amount of accumulated unrealized loss on investments in debt and equity securities classified as available-for-sale in a continuous loss position.

+ 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=82897076&loc=d3e27337-111563

Reference 2: 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=82897076&loc=d3e27290-111563

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- Definition

This item represents the aggregate fair value of investments in debt and equity securities in an unrealized loss position which are categorized neither as held-to-maturity nor trading securities.

+ 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)(1)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563

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- Definition

Fair value of financial instrument held by the entity for its own account (proprietary securities) for trading or investment purposes that are carried at fair value and pledged to counterparties as collateral for financing transactions where counterparty has the right to re-pledge such.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 860
-SubTopic 30
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66007379&loc=d3e113888-111728

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- Definition

Represents the quantification of the effect of adopting the new accounting standard or change in accounting principle expected by the entity to have a significant effect on the entity's financial statements.

+ References

No definition available.

+ Details

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- Definition

The cumulative amount of credit losses recognized in earnings related to debt securities held for which a portion of an other than temporary impairment (OTTI) was recognized in other comprehensive income (a component of shareholders' equity).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 8B
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=SL6284393-111563

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 8B
-Subparagraph (g)
-URI http://asc.fasb.org/extlink&oid=82897076&loc=SL6284393-111563

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Investment Securities (Narrative) (Details) $ in Thousands	3 Months Ended
Investment Securities (Narrative) (Details) $ in Thousands	Mar. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)
Investment [Line Items]
Equity Securities, FV-NI, Cost	$ 4,400
Equity securities, FV-NI	49,784	$ 48,838
Equity securities, FV-NI, Unrealized Gain	947
Equtiy Securities without Readily Determinable Fair Values	1,728	1,753
U.S. Treasury inflation-protected securities held, at fair value	$ 442,400
Percentage decrease requiring a review for impairment	20.00%
Fair value of securities on other-than-temporary impairment watch list	$ 62,800	68,000
Credit-related portion of impairments included in earnings, for securities on watch list	14,213	14,199	$ 14,116	$ 14,080
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	6,474,820	5,172,412
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	114,373	44,122
AFS securities in loss position at period-end, change in unrealized loss	70,300
Securities pledged as collateral	3,700,000
Securities pledged as collateral and may be sold or re-pledged	$ 659,400
Number of investments in a single issuer that exceed 10% of stockholder's equity	0
No investment in a single issuer exceeds this percentage of stockholder's equity	10.00%
State And Municipal Obligations [Member]
Investment [Line Items]
Auction rate securities held at fair value	$ 17,200
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	574,173	332,182
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	8,176	2,754
Non-Agency Mortgage-Backed Securities [Member]
Investment [Line Items]
Fair value of securities on other-than-temporary impairment watch list	24,800
Credit-related portion of impairments included in earnings, for securities on watch list	14,200
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value	867,390	730,830
Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss	12,319	$ 4,837
Accounting Standards Update 2016-01 [Member]
Investment [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Effect of Adoption, Quantification	$ 33,320