Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 107,313	$ 30,514
Accounts receivable, net	87,915	66,882
Inventories	35,451	34,524
Prepaid expenses and other assets	18,106	16,878
Total current assets	248,785	148,798
Property, plant and equipment, net	108,233	103,110
Goodwill and other intangibles	74,608	71,319
Other assets	3,283	3,000
Total assets	434,909	326,227
Current liabilities:
Accounts payable	18,198	9,953
Accrued expenses and other liabilities	52,244	46,266
Accrued warranty	5,400	6,290
Line of credit	0	0
Total current liabilities	75,842	62,509
Deferred income taxes	1,286	1,286
Non-current accrued warranty	27,235	28,709
Other long-term liabilities	1,892	2,473
Total liabilities	106,255	94,977
Commitments and contingencies
Stockholders' equity:
Preferred stock, $0.01 par value, 3,000,000 shares authorized; none issued and outstanding
Common stock, $0.01 par value, 120,000,000 shares authorized; 69,991,454 and 69,844,222 shares issued and 58,754,048 and 58,856,860 shares outstanding at September 30, 2018 and December 31, 2017, respectively	700	349
Additional paid-in capital	122,725	122,043
Retained earnings	391,770	282,370
Treasury stock, at cost, 11,237,406 and 10,987,362 shares at September 30, 2018 and December 31, 2017, respectively	(186,541)	(173,512)
Total stockholders' equity	328,654	231,250
Total liabilities and stockholders' equity	$ 434,909	$ 326,227