Current Assets and Current Liabilities (Tables)

12 Months Ended

Sep. 30, 2016

Current Assets and Current Liabilities

Schedule of allowance for trade receivables

	Balance at
	beginning		Charged		Accounts		Balance at
(in thousands)	of year		to expense		written off		end of year
2014	$	2,777	$	2,022	$	(1,261)	$	3,538
2015		3,538		1,424		(1,152)		3,810
2016		3,810		1,552		(1,199)		4,163

Schedule of components of inventory

(in thousands)	2015		2016
Raw materials	$	12,831	$	22,333
Finished goods		42,243		50,335
	$	55,074	$	72,668

Schedule of activity in the warranty liability account

	Balance at				Changes in		Additions				Balance at
	beginning		Charged		prior year		From			Payments	end of
(in thousands)	of year		to expense		estimates		acquisitions			for claims	year
2014	$	2,141	$	1,992	$	32	$	4,842	$	(1,788)	$	7,219
2015		7,219		2,020		(461)		—		(2,010)		6,768
2016		6,768		1,393		(265)		3,093		(1,651)		9,338

Schedule of other accrued liabilities

(in thousands)	2015		2016
Products and services received but not yet invoiced	$	24,215	$	25,609
Acquisition liabilities		400		12,400
Other		27,166		25,776
	$	51,781	$	63,785