Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Sep. 30, 2017
Current assets
Cash and cash equivalents	$ 66,403	$ 108,733
Accounts receivable, net of allowance for doubtful accounts of $5,439 and $5,371, respectively	111,894	123,994
Unbilled accounts receivable, net	64,108	76,914
Inventories, net	142,431	127,728
Prepaid expenses and other current assets	27,296	19,880
Total current assets	412,132	457,249
Property and equipment, net	94,341	99,930
Goodwill	369,815	369,762
Intangible assets, net	247,076	255,079
Other long-term assets	3,061	4,116
Deferred income taxes	3,483	3,556
Total assets	1,129,908	1,189,692
Current liabilities
Current maturities of long-term debt, net	48,913	39,095
Accounts payable	47,400	47,515
Accrued payroll and related costs	38,971	49,434
Advance payments from customers	78,702	76,712
Accrued warranty costs	5,589	6,018
Accrued income taxes	3,318	4,464
Accrued dividends	5,354	5,278
Other accrued liabilities	18,193	18,873
Total current liabilities	246,440	247,389
Long-term debt, less current maturities, net	342,419	418,544
Deferred income taxes	44,721	74,981
Non-current accrued income taxes	10,118	5,855
Defined benefit pension plan obligation	8,583	8,588
Other long-term liabilities	5,077	5,558
Total liabilities	657,358	760,915
Shareholders' Equity
Common stock, $0.25 par value; 64,000 shares authorized: 17,844 and 17,760 shares issued and outstanding as of June 30, 2018 and September 30, 2017, respectively	4,461	4,440
Additional paid-in capital	169,339	163,632
Retained earnings	295,825	261,258
Accumulated other comprehensive income (loss)	2,925	(553)
Total shareholders' equity	472,550	428,777
Total liabilities and shareholders' equity	$ 1,129,908	$ 1,189,692