Pension Plan and Retirement Benefits (Tables)

12 Months Ended

Sep. 30, 2017

Pension Plan and Retirement Benefits

Schedule of status of employee pension benefit plans and other postretirement benefit plans

	Defined Benefit				Postretirement
	Pension Plans				Health Care Benefits
	Year Ended				Year Ended
	September 30,				September 30,
	2016		2017		2016		2017
Change in Benefit Obligation:
Projected benefit obligation at beginning of year	$	311,943	$	337,338	$	110,534	$	125,117
Service cost		4,080		6,282		232		350
Interest cost		12,050		10,577		4,595		4,292
Actuarial losses		32,370		(27,246)		15,283		(8,072)
Benefits paid		(23,105)		(14,682)		(5,527)		(4,263)
Administrative expenses		—		(1,466)		—		—
Projected benefit obligation at end of year	$	337,338	$	310,803	$	125,117	$	117,424
Change in Plan Assets:
Fair value of plan assets at beginning of year	$	205,498	$	207,963	$	—	$	—
Actual return on assets		18,792		25,475		—		—
Employer contributions		6,778		6,804		5,527		4,263
Benefits paid		(23,105)		(14,682)		(5,527)		(4,263)
Administrative expenses		-		(1,466)		—		—
Fair value of plan assets at end of year	$	207,963	$	224,094	$	—	$	—
Funded Status of Plan:
Unfunded status	$	(129,375)	$	(86,709)	$	(125,117)	$	(117,424)

Schedule of amounts recognized in the consolidated balance sheets and amounts expected to be recognized from AOCI into the statement of operations in the following year

	Defined Benefit				Postretirement				Non-Qualified				All Plans
	Pension Plans				Health Care Benefits				Pension Plans				Combined
	September 30,				September 30,				September 30,				September 30,
	2016		2017		2016		2017		2016		2017		2016		2017
Accrued pension and postretirement benefits:
Current	$	—	$	—	$	(5,000)	$	(5,000)	$	(95)	$	(95)	$	(5,095)	$	(5,095)
Non-current		(129,375)		(86,709)		(120,117)		(112,424)		(759)		(682)		(250,251)		(199,815)
Accrued pension and postretirement benefits	$	(129,375)	$	(86,709)	$	(125,117)	$	(117,424)	$	(854)	$	(777)	$	(255,346)	$	(204,910)
Accumulated other comprehensive loss:
Net loss		116,388		66,819		47,636		35,286		—		—		164,024		102,105
Prior service cost		3,020		2,213		—		—		—		—		3,020		2,213
Total accumulated other comprehensive loss	$	119,408	$	69,032	$	47,636	$	35,286	$	—	$	—	$	167,044	$	104,318
Amounts expected to be recognized from AOCI into the statement of operations in the following year:
Amortization of net loss	$	11,268	$	4,910	$	4,278	$	2,999	$	—	$	—	$	15,546	$	7,909
Amortization of prior service cost		808		374		—		—		—		—		808		374
	$	12,076	$	5,284	$	4,278	$	2,999	$	—	$	—	$	16,354	$	8,283

Schedule of components of net periodic pension and postretirement benefit cost

	Defined Benefit Pension Plans
	Year Ended September 30,
	2015		2016		2017
Service cost	$	3,898	$	4,080	$	6,282
Interest cost		11,203		12,050		10,577
Expected return on assets		(15,117)		(14,380)		(14,419)
Amortization of prior service cost		808		808		808
Recognized actuarial loss		4,645		8,838		11,267
Net periodic cost	$	5,437	$	11,396	$	14,515

	Postretirement
	Health Care Benefits
	Year Ended September 30,
	2015		2016		2017
Service cost	$	337	$	232	$	350
Interest cost		4,385		4,595		4,292
Recognized actuarial loss		2,433		2,825		4,278
Net periodic cost	$	7,155	$	7,652	$	8,920

Schedule of assumptions used to determine actuarial present value of the projected pension benefit obligation and postretirement health care benefit obligation for the plans

	September 30,		September 30,
	2016		2017
Discount rate (postretirement health care)	3.50	%	3.75	%
Discount rate (U.S. pension plan)	3.25	%	3.63	%
Discount rate (U.K. pension plan)	2.30	%	2.50	%
Rate of compensation increase (U.S. pension plan only)	3.50	%	2.50	%

Schedule of assumptions used to determine net periodic pension and postretirement health care benefit costs for the plans

	Defined Benefit
	Pension and
	Postretirement Health
	Care Plans
	Year Ended
	September 30,
	2015		2016		2017
Discount rate (postretirement health care plan)	4.25	%	4.25	%	3.50	%
Discount rate (U.S. pension plan)	4.00	%	4.00	%	3.25	%
Discount rate (U.K. pension plan)	3.90	%	3.70	%	2.30	%
Expected return on plan assets (U.S. pension plan)	7.50	%	7.50	%	7.50	%
Expected return on plan assets (U.K. pension plan)	4.40	%	4.10	%	2.70	%
Rate of compensation increase (U.S. pension plan only)	3.50	%	3.50	%	3.50	%

Schedule of plan assets by level within the fair value hierarchy

	September 30, 2016
	Level 1
	Active		Level 2
	Markets for		Other
	Identical		Observable
	Assets		Inputs		NAV		Total
U.S. Pension Plan Assets:
U.S. common stock mutual funds	$	—	$	—	$	64,333	$	64,333
Common /collective funds
Bonds		—		—		75,686		75,686
U.S. common stock		—		—		39,735		39,735
International equity		—		—		9,461		9,461
Total U.S.	$	—	$	—	$	189,215	$	189,215
U.K. Plan Assets:
Equities	$	—	$	—	$	7,499	$	7,499
Bonds		—		—		9,187		9,187
Other		—		—		2,062		2,062
Total U.K.	$	—	$	—	$	18,748	$	18,748
Total pension plan assets	$	—	$	—	$	207,963	$	207,963

	September 30, 2017
	Level 1
	Active		Level 2
	Markets for		Other
	Identical		Observable
	Assets		Inputs		NAV		Total
U.S. Pension Plan Assets:
U.S. common stock mutual funds	$	—	$	—	$	73,430	$	73,430
Common /collective funds
Bonds		—		—		81,702		81,702
U.S. common stock		—		—		32,784		32,784
International equity		—		—		16,341		16,341
Total U.S.	$	—	$	—	$	204,257	$	204,257
U.K. Plan Assets:
Equities	$	—	$	—	$	8,913	$	8,913
Bonds		—		—		7,750		7,750
Other		—		—		3,174		3,174
Total U.K.	$	—	$	—	$	19,837	$	19,837
Total pension plan assets	$	—	$	—	$	224,094	$	224,094

Schedule of asset classes as a percent of total assets

Asset Class	Target(1)
Equity	60	%
Fixed Income	40	%
Real Estate and Other	—	%

⁽¹⁾ From time to time the Company may adjust the target allocation by an amount not to exceed 10%.

Schedule of expected benefit payments

			Postretirement
Fiscal Year Ending September 30	Pension		Health Care
2018	$	15,358	$	5,000
2019		15,649		5,000
2020		16,161		5,000
2021		16,564		5,000
2022		17,120		5,000
2023 - 2027 (in total)		90,470		25,000