Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Sep. 30, 2017
Current assets
Cash and cash equivalents	$ 84,378	$ 108,733
Accounts receivable, net of allowance for doubtful accounts of $5,775 and $5,371, respectively	118,593	123,994
Unbilled accounts receivable, net	60,729	76,914
Inventories, net	143,487	127,728
Prepaid expenses and other current assets	25,227	19,880
Total current assets	432,414	457,249
Property and equipment, net	95,573	99,930
Goodwill	370,513	369,762
Intangible assets, net	250,470	255,079
Other long-term assets	3,211	4,116
Deferred income taxes	3,740	3,556
Total assets	1,155,921	1,189,692
Current liabilities
Current maturities of long-term debt, net	53,210	39,095
Accounts payable	47,394	47,515
Accrued payroll and related costs	38,164	49,434
Advance payments from customers	83,039	76,712
Accrued warranty costs	6,191	6,018
Accrued income taxes	3,317	4,464
Accrued dividends	5,291	5,278
Other accrued liabilities	20,459	18,873
Total current liabilities	257,065	247,389
Long-term debt, less current maturities, net	356,523	418,544
Deferred income taxes	44,373	74,981
Non-current accrued income taxes	10,729	5,855
Defined benefit pension plan obligation	9,287	8,588
Other long-term liabilities	5,714	5,558
Total liabilities	683,691	760,915
Shareholders' Equity
Common stock, $0.25 par value; 64,000 shares authorized: 17,792 and 17,760 shares issued and outstanding as of March 31, 2018 and September 30, 2017, respectively	4,448	4,440
Additional paid-in capital	166,757	163,632
Retained earnings	292,200	261,258
Accumulated other comprehensive income (loss)	8,825	(553)
Total shareholders' equity	472,230	428,777
Total liabilities and shareholders' equity	$ 1,155,921	$ 1,189,692