CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Mar. 31, 2021	Sep. 30, 2020
Current assets:
Cash and cash equivalents	$ 45,653	$ 52,560
Accounts receivable, net	124,580	144,082
Contract assets	95,002	96,746
Inventories, net	145,342	136,189
Other current assets	17,523	17,053
Total current assets	428,100	446,630
Property, plant and equipment, net of accumulated depreciation of $140,784 and $130,534, respectively	143,401	139,870
Intangible assets, net of accumulated amortization of $138,928 and $129,063, respectively	345,261	346,632
Goodwill	411,661	408,063
Operating lease assets	18,929	21,390
Other assets	10,050	10,938
Total assets	1,357,402	1,373,523
Current liabilities:
Current maturities of long-term debt and short-term borrowings	20,000	22,368
Accounts payable	47,091	50,525
Contract liabilities	106,622	100,551
Accrued salaries	28,740	32,149
Accrued other expenses	44,130	50,436
Total current liabilities	246,583	256,029
Deferred tax liabilities	59,949	60,938
Non-current operating lease liabilities	14,501	16,785
Other liabilities	39,362	38,176
Long-term debt	2,000	40,000
Total liabilities	362,395	411,928
Shareholders' equity:
Preferred stock, par value $.01 per share, authorized 10,000,000 shares
Common stock, par value $.01 per share, authorized 50,000,000 shares, issued 30,645,625 and 30,645,625 shares, respectively	306	306
Additional paid-in capital	295,796	293,682
Retained earnings	804,231	778,398
Accumulated other comprehensive income (loss), net of tax	1,808	(3,657)
Total stockholders' equity before treasury stock	1,102,141	1,068,729
Less treasury stock, at cost: 4,607,911 and 4,607,911 common shares, respectively	(107,134)	(107,134)
Total shareholders' equity	995,007	961,595
Total liabilities and shareholders' equity	$ 1,357,402	$ 1,373,523