CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Jun. 30, 2021	Sep. 30, 2020
Current assets:
Cash and cash equivalents	$ 78,359	$ 52,560
Accounts receivable, net	135,343	144,082
Contract assets	94,768	94,302
Inventories, net	141,113	135,296
Other current assets	21,282	17,053
Total current assets	470,865	443,293
Property, plant and equipment, net of accumulated depreciation of $144,642 and $130,534, respectively	141,967	139,870
Intangible assets, net of accumulated amortization of $143,792 and $129,063, respectively	343,346	346,632
Goodwill	411,732	408,063
Operating lease assets	30,426	21,390
Other assets	10,347	10,938
Total assets	1,408,683	1,370,186
Current liabilities:
Current maturities of long-term debt and short-term borrowings	20,000	22,368
Accounts payable	50,921	50,525
Contract liabilities	105,822	100,551
Accrued salaries	33,132	32,149
Accrued other expenses	43,517	50,436
Total current liabilities	253,392	256,029
Deferred tax liabilities	56,992	60,170
Non-current operating lease liabilities	26,458	16,785
Other liabilities	38,987	38,176
Long-term debt	28,000	40,000
Total liabilities	403,829	411,160
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 30,665,868 and 30,645,625 shares, respectively	307	306
Additional paid-in capital	296,578	293,682
Retained earnings	812,709	775,829
Accumulated other comprehensive income (loss), net of tax	2,343	(3,657)
Total stockholders' equity before treasury stock	1,111,937	1,066,160
Less treasury stock, at cost: 4,604,741 and 4,607,911 common shares, respectively	(107,083)	(107,134)
Total shareholders' equity	1,004,854	959,026
Total liabilities and shareholders' equity	$ 1,408,683	$ 1,370,186