XML 53 R30.htm IDEA: XBRL DOCUMENT

Securities (Tables)

3 Months Ended

Mar. 31, 2015

Investments, Debt and Equity Securities [Abstract]

Amortized Cost and Estimated Fair Value of Securities, Excluding Trading Securities

A summary of the amortized cost and estimated fair value of securities, excluding trading securities, is presented below.



	March 31, 2015								December 31, 2014
	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value		Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Estimated Fair Value
Held to Maturity
U.S. Treasury	$	249,115	$	14,030	$	—	$	263,145	$	249,009	$	14,604	$	—	$	263,613
Residential mortgage-backed securities	7,499		113		—		7,612		8,012		92		—		8,104
States and political subdivisions	2,559,547		43,007		7,957		2,594,597		2,668,115		34,243		9,035		2,693,323
Other	1,350		—		—		1,350		1,350		—		—		1,350
Total	$	2,817,511	$	57,150	$	7,957	$	2,866,704	$	2,926,486	$	48,939	$	9,035	$	2,966,390
Available for Sale
U.S. Treasury	$	3,711,872	$	64,203	$	1,998	$	3,774,077	$	3,783,899	$	30,594	$	3,241	$	3,811,252
Residential mortgage-backed securities	1,256,377		67,713		377		1,323,713		1,331,114		68,027		417		1,398,724
States and political subdivisions	3,428,238		107,136		3,071		3,532,303		3,104,563		104,500		156		3,208,907
Other	42,404		—		—		42,404		42,371		—		—		42,371
Total	$	8,438,891	$	239,052	$	5,446	$	8,672,497	$	8,261,947	$	203,121	$	3,814	$	8,461,254

Securities, with Unrealized Losses Segregated by Length of Impairment

As of March 31, 2015, securities with unrealized losses, segregated by length of impairment, were as follows:



	Less than 12 Months				More than 12 Months				Total
	Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses		Estimated Fair Value		Unrealized Losses
Held to Maturity
States and political subdivisions	$	227,355	$	1,163	$	296,614	$	6,794	$	523,969	$	7,957
Total	$	227,355	$	1,163	$	296,614	$	6,794	$	523,969	$	7,957
Available for Sale
U.S. Treasury	$	526,222	$	1,998	$	—	$	—	$	526,222	$	1,998
Residential mortgage-backed securities	8,360		95		12,398		282		20,758		377
States and political subdivisions	286,513		3,071		—		—		286,513		3,071
Total	$	821,095	$	5,164	$	12,398	$	282	$	833,493	$	5,446

Amortized Cost and Estimated Fair Value of Securities, Excluding Trading Securities, Presented by Contractual Maturity

The amortized cost and estimated fair value of securities, excluding trading securities, at March 31, 2015 are presented below by contractual maturity. Expected maturities may differ from contractual maturities because issuers may have the right to call or prepay obligations. Residential mortgage-backed securities and equity securities are shown separately since they are not due at a single maturity date.



	Held to Maturity				Available for Sale
	Amortized Cost		Estimated Fair Value		Amortized Cost		Estimated Fair Value
Due in one year or less	$	186,337	$	191,861	$	14,228	$	14,542
Due after one year through five years	491,938		523,304		3,110,546		3,146,176
Due after five years through ten years	220,730		222,875		1,718,927		1,778,335
Due after ten years	1,911,007		1,921,052		2,296,409		2,367,327
Residential mortgage-backed securities	7,499		7,612		1,256,377		1,323,713
Equity securities	—		—		42,404		42,404
Total	$	2,817,511	$	2,866,704	$	8,438,891	$	8,672,497

Sales of Securities Available for Sale

Sales of securities available for sale were as follows:



	Three Months Ended March 31,
	2015			2014
Proceeds from sales	$	223,987		$	—
Gross realized gains	228			—
Gross realized losses	—			—
Tax (expense) benefit of securities gains/losses	(80		)	—

Premium Amortization and Discount Accretion Included in Income on Securities [Table Text Block]

Premium amortization and discount accretion included in interest income on securities was as follows:



	Three Months Ended March 31,
	2015			2014
Premium amortization	$	(20,006	)	$	(15,396	)
Discount accretion	2,698			1,586
Net (premium amortization) discount accretion	$	(17,308	)	$	(13,810	)

Trading Account Securities, at Estimated Fair Value

Trading account securities, at estimated fair value, were as follows:



	March 31, 2015		December 31, 2014
U.S. Treasury	$	12,833	$	15,339
States and political subdivisions	2,829		87
Total	$	15,662	$	15,426

Net Gains and Losses on Trading Account Securities

Net gains and losses on trading account securities were as follows:



	Three Months Ended March 31,
	2015			2014
Net gain on sales transactions	$	280		$	240
Net mark-to-market gains (losses)	(14		)	(3		)
Net gain (loss) on trading account securities	$	266		$	237

- Definition

Tabular disclosure of available-for-sale securities which includes, but is not limited to, changes in the cost basis and fair value, fair value and gross unrealized gain (loss), fair values by type of security, contractual maturity and classification, amortized cost basis, contracts to acquire securities to be accounted for as available-for-sale, debt maturities, transfers to trading, change in net unrealized holding gain (loss) net of tax, continuous unrealized loss position fair value, aggregate losses qualitative disclosures, other than temporary impairment (OTTI) losses or other disclosures related to available for sale securities.

+ References+ Details

- Definition

Tabular disclosure of the realized and unrealized gains and losses reported in the statement of income which have resulted from the sale and holding of marketable securities, respectively, as well as the sale or disposal of cost method investments. Such amounts would include realized gains and losses on the sale or disposal of trading, available-for-sale, and held-to-maturity securities, unrealized gains and losses on trading securities, unrealized gains and losses on available-for-sale and held-to-maturity securities transferred to the trading securities category, realized gains and losses on the sale or disposal of cost method investments, and losses recognized for other than temporary impairments (OTTI) of such investments.

+ References+ Details

- Definition

Tabular disclosure of marketable securities. This may consist of investments in certain debt and equity securities, short-term investments and other assets.

+ References+ Details

- Definition

Tabular disclosure of investments in trading securities.

+ References+ Details