FHLB and Other Borrowings (Tables)

12 Months Ended

Dec. 31, 2015

Debt Disclosure [Abstract]

Schedule of details on FHLB advances and other borrowings

The following table details the Company’s FHLB advances and other borrowings including maturities and interest rates as of December 31, 2015.

		December 31,
	Maturity Dates	2015			2014
		(In Thousands)
FHLB advances:
LIBOR-based floating rate (weighted average rate of 0.62%)	2016-2021	$	525,000		$	525,000
Fixed rate (weighted average rate of 1.08%)	2015-2035	2,418,071			2,463,543
Unamortized discount		(27		)	(102		)
Total FHLB advances		2,943,044			2,988,441
Senior notes and subordinated debentures:
1.85% senior notes	2017	400,000			400,000
2.75% senior notes	2019	600,000			600,000
6.40% subordinated debentures	2017	350,000			350,000
5.50% subordinated debentures	2020	227,764			227,764
3.88% subordinated debentures	2025	700,000			—
5.90% subordinated debentures	2026	71,086			71,086
Fair value of hedged subordinated debentures		65,384			83,953
Net unamortized discount		(22,359		)	(15,135		)
Total senior notes and subordinated debentures		2,391,875			1,717,668
Capital securities:
LIBOR plus 3.05% floating rate debentures payable to State National Capital Trust I	2033	15,470			15,470
LIBOR plus 2.85% floating rate debentures payable to Texas Regional Statutory Trust I	2034	51,547			51,547
LIBOR plus 2.60% floating rate debentures payable to TexasBanc Capital Trust I	2034	25,774			25,774
LIBOR plus 2.79% floating rate debentures payable to State National Statutory Trust II	2034	10,310			10,310
Unamortized premium		600			633
Total capital securities		103,701			103,734
Total FHLB and other borrowings		$	5,438,620		$	4,809,843

Schedule of maturity information on FHLB and other borrowings

The following table presents maturity information for the Company’s FHLB and other borrowings, including the fair value of hedged senior notes and subordinated debentures and unamortized discounts and premiums, as of December 31, 2015.

	FHLB Advances		Senior Notes and Subordinated Debentures		Capital Securities
	(In Thousands)
Maturing:
2016	$	2,412,211	$	—	$	—
2017	57		814,291		—
2018	12		—		—
2019	350,000		597,436		—
2020	—		221,787		—
Thereafter	180,764		758,361		103,701
Total	$	2,943,044	$	2,391,875	$	103,701