Pension and Other Postretirement Plans (Details) (USD $)	3 Months Ended		9 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Sep. 30, 2012	Dec. 31, 2007
Defined Benefit Pension Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Vesting percentage in accrued benefits from plan freeze				100.00%
Service cost	$ 47,000	$ 44,000
Interest cost	218,000	232,000
Expected return on plan assets	(283,000)	(268,000)
Amortization of prior service cost	1,000	1,000
Amortization of net loss	203,000	196,000
Net periodic benefit cost	186,000	205,000
Minimum required contribution			700,000
Company expected contributions to plans in fiscal year			400,000
Contributions payable, from prior plan years			100,000
Company contributions to plan			100,000
Chairman and President Non-Qualified Defined Benefit Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	44,000	42,000
Interest cost	200,000	228,000
Amortization of prior service cost	15,000	15,000
Amortization of net loss	294,000	285,000
Net periodic benefit cost	553,000	570,000
Company expected contributions to plans in fiscal year	2,000,000
Company contributions to plan	400,000
Aggregate average annual participant salary increase (as a percentage)	10.00%
Defined Benefit Postretirement Healthcare Plans [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Interest cost	29,000	32,000
Amortization of prior service cost	26,000	26,000
Amortization of net loss	8,000	11,000
Net periodic benefit cost	$ 63,000	$ 69,000