Balance Sheet Components

Balance sheet details as of September 30, 2018 and December 31, 2017 are presented in the tables below:



	September 30, 2018			December 31, 2017
	(In thousands)
Inventories:
Raw materials	$	32,529		$	31,275
Work in process	9,929			8,718
Finished goods	56,773			56,144
Total inventories	$	99,231		$	96,137

Property and equipment:
Equipment	$	77,837		$	69,550
Furniture and fixtures	7,961			6,534
Leasehold improvements	16,209			10,976
Software	39,611			37,168
Construction in progress	11,428			9,813
Property and equipment, gross	153,046			134,041
Accumulated depreciation and amortization	(102,562		)	(91,446		)
Total property and equipment, net	$	50,484		$	42,595

Other long term assets:
Capitalized software, net	$	52,088		$	38,599
Unbilled receivables	15,573			9,475
Other assets	1,287			1,242
Total other long term assets, net	$	68,948		$	49,316

Accrued liabilities:
Advance payments from customers	$	4,850		$	7,779
Rebates and lease buyouts	8,273			5,428
Group purchasing organization fees	4,023			3,449
Taxes payable	5,770			9,183
Other accrued liabilities	12,861			9,854
Total accrued liabilities	$	35,777		$	35,693

Depreciation expense of property and equipment was $3.7 million and $3.8 million for the three months ended September 30, 2018 and 2017, respectively. Depreciation expense of property and equipment was $11.0 million and $12.1 million for the nine months ended September 30, 2018 and 2017, respectively.

The following table summarizes the changes in accumulated balances of other comprehensive income (loss) for the three and nine months ended September 30, 2018 and 2017:



	Three months ended September 30,
	2018									2017
	Foreign currency translation adjustments			Unrealized gain (loss) on interest rate swap hedges			Total			Foreign currency translation adjustments			Unrealized gain (loss) on interest rate swap hedges			Total
	(In thousands)
Beginning balance	$	(8,896	)	$	953		$	(7,943	)	$	(8,765	)	$	1,274		$	(7,491	)
Other comprehensive income (loss) before reclassifications	(907		)	90			(817		)	1,389			35			1,424
Amounts reclassified from other comprehensive income (loss), net of tax	—			(324		)	(324		)	—			(109		)	(109		)
Net current-period other comprehensive income (loss), net of tax	(907		)	(234		)	(1,141		)	1,389			(74		)	1,315
Ending balance	$	(9,803	)	$	719		$	(9,084	)	$	(7,376	)	$	1,200		$	(6,176	)




	Nine months ended September 30,
	2018									2017
	Foreign currency translation adjustments			Unrealized gain (loss) on interest rate swap hedges			Total			Foreign currency translation adjustments			Unrealized gain (loss) on interest rate swap hedges			Total
	(In thousands)
Beginning balance	$	(6,954	)	$	841		$	(6,113	)	$	(10,764	)	$	1,245		$	(9,519	)
Other comprehensive income (loss) before reclassifications	(2,849		)	686			(2,163		)	3,388			111			3,499
Amounts reclassified from other comprehensive income (loss), net of tax	—			(808		)	(808		)	—			(156		)	(156		)
Net current-period other comprehensive income (loss), net of tax	(2,849		)	(122		)	(2,971		)	3,388			(45		)	3,343
Ending balance	$	(9,803	)	$	719		$	(9,084	)	$	(7,376	)	$	1,200		$	(6,176	)