Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 245,525	$ 279,736
Restricted cash	841	847
Short-term investments	65,130	47,780
Accounts receivable, net	108,219	98,866
Contract assets	1,984	160
Inventories	130,964	120,266
Deferred cost of sales	1,080	15,994
Prepaid expenses and other current assets	29,615	33,437
Total current assets	583,358	597,086
Property, plant and equipment, net	83,100	85,058
Intangible assets, net	356,311	369,843
Goodwill	307,131	307,131
Deferred income taxes	3,281	3,047
Other assets	28,847	25,310
Total assets	1,362,028	1,387,475
Current liabilities:
Accounts payable	58,273	50,318
Accrued expenses and other current liabilities	54,297	58,068
Customer deposits and deferred revenue	94,473	112,032
Income taxes payable	1,581	3,846
Total current liabilities	208,624	224,264
Deferred income taxes	36,794	36,845
Long-term debt	278,489	275,630
Other liabilities	10,164	10,643
Total liabilities	534,071	547,382
Stockholders' equity:
Preferred stock, $0.01 par value; 500,000 shares authorized; no shares issued and outstanding
Common stock, $0.01 par value; 120,000,000 shares authorized; 48,691,371 and 48,229,251 shares issued at March 31, 2018 and December 31, 2017, respectively; 48,691,371 and 48,144,416 shares outstanding at March 31, 2018 and December 31, 2017, respectively.	487	482
Additional paid-in capital	1,054,331	1,051,953
Accumulated deficit	(228,697)	(212,870)
Accumulated other comprehensive income	1,836	1,812
Treasury stock, at cost, 84,835 shares at December 31, 2017.		(1,284)
Total stockholders' equity	827,957	840,093
Total liabilities and stockholders' equity	$ 1,362,028	$ 1,387,475