Derivatives and Hedging Activities (Tables)

9 Months Ended

Jun. 30, 2014

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Schedule of Fair Value and Balance Sheet Classification

Although management is not aware of any factors that would materially affect the estimated fair value amounts presented below, such amounts have not been comprehensively revalued for purposes of these financial statements since the dates shown, and therefore, estimates of fair value subsequent to those dates may differ significantly from the amounts presented below.

		June 30, 2014				September 30, 2013
	Level in Fair Value Hierarchy	Carrying Amount		Estimated Fair Value		Carrying Amount		Estimated Fair Value
		(In thousands)
Financial assets
Cash and cash equivalents	1	$	861,304	$	861,304	$	203,563	$	203,563
Available-for-sale securities
Equity securities	1	101,981		101,981		101,237		101,237
Obligations of U.S. government	2	721,312		721,312		533,975		533,975
Obligations of states and political subdivisions	2	23,277		23,277		22,545		22,545
Corporate debt securities	2	485,083		485,083		452,015		452,015
Mortgage-backed securities
Agency pass-through certificates	2	1,662,001		1,662,001		1,251,176		1,251,176
Other Commercial MBS	2	109,367		109,367		—		—
Total available-for-sale securities		3,103,021		3,103,021		2,360,948		2,360,948
Held-to-maturity securities	2
Total held-to-maturity securities		1,583,852		1,534,239		1,654,666		1,582,849
Loans receivable	3	7,965,954		8,516,535		7,528,030		8,070,279
Covered loans	3	207,207		212,002		295,947		300,610
FDIC indemnification asset	3	44,065		43,117		64,615		62,300
FHLB and FRB stock	2	162,904		162,904		173,009		173,009
Financial liabilities
Customer accounts	2	10,765,680		10,050,132		9,090,271		8,585,068
FHLB advances and other borrowings	2	1,930,000		2,055,239		1,930,000		2,064,248

The following table presents the fair value and balance sheet classification of derivatives not designated as hedging instruments at June 30, 2014 and September 30, 2013:

Asset Derivatives

Liability Derivatives

June 30, 2014

September 30, 2013

June 30, 2014

September 30, 2013

Balance Sheet

Balance Sheet

Balance Sheet

Balance Sheet

Location

Fair Value

Location

Fair Value

Location

Fair Value

Location

Fair Value

(In thousands)

Interest rate contracts

Other assets

$

2,731

Other assets

$

7

Other liabilities

$

2,731

Other liabilities

$

7

Commitments to purchase MBS

AFS securities

—

AFS securities

$

3,188

N/A

N/A

N/A

N/A