Regulatory Matters (Tables)

12 Months Ended

Sep. 30, 2016

Banking and Thrift [Abstract]

Schedule of regulatory capital amounts and requirements

Capital amounts and ratios are presented in the following table:

	Actual				For Capital Adequacy Purposes				To Be Well Capitalized Under Prompt Corrective Action Provisions
	Amount		Ratio		Amount		Ratio		Amount		Ratio
	(dollars in thousands)
As of September 30, 2016
Tier 1 risk based capital (to risk-weighted assets):
Consolidated	$	1,001,873	11.1	%	$	541,553	6.0	%	N/A		N/A
Bank	1,023,386		11.3	%	543,391		6.0	%	$	724,521	8.0	%
Total risk based capital (to risk-weighted assets):
Consolidated	1,101,997		12.2	%	722,621		8.0	%	N/A		N/A
Bank	1,088,511		12.0	%	725,674		8.0	%	907,093		10.0	%
Tier 1 leverage capital (to average assets):
Consolidated	1,001,873		9.5	%	421,841		4.0	%	N/A		N/A
Bank	1,023,386		9.7	%	422,015		4.0	%	527,519		5.0	%
Common Equity Tier 1 risk based capital (to risk-weighted assets):
Consolidated	924,718		10.2	%	407,964		4.5	%	N/A		N/A
Bank	$	1,023,386	11.3	%	$	407,543	4.5	%	$	588,673	6.5	%

	Actual				For Capital Adequacy Purposes				To Be Well Capitalized Under Prompt Corrective Action Provisions
	Amount		Ratio		Amount		Ratio		Amount		Ratio
	(dollars in thousands)
As of September 30, 2015
Tier 1 risk based capital (to risk-weighted assets):
Consolidated	$	825,211	10.9	%	$	456,338	6.0	%	N/A		N/A
Bank	850,464		11.2	%	455,606		6.0	%	$	607,474	8.0	%
Total risk based capital (to risk-weighted assets):
Consolidated	917,446		12.1	%	608,084		8.0	%	N/A		N/A
Bank	907,700		12.0	%	607,665		8.0	%	759,582		10.0	%
Tier 1 leverage capital (to average assets):
Consolidated	825,211		9.1	%	361,538		4.0	%	N/A		N/A
Bank	850,464		9.4	%	361,131		4.0	%	451,414		5.0	%
Common Equity Tier 1 risk based capital (to risk-weighted assets):
Consolidated	769,128		10.1	%	342,004		4.5	%	N/A		N/A
Bank	$	850,464	11.2	%	$	341,704	4.5	%	$	493,573	6.5	%