Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 2,699	$ 30,514
Accounts receivable, net	206,525	66,882
Inventories	42,453	34,524
Prepaid expenses and other assets	15,610	16,878
Total current assets	267,287	148,798
Property, plant and equipment, net	105,035	103,110
Goodwill and other intangibles	70,094	71,319
Other assets	2,968	3,000
Total assets	445,384	326,227
Current liabilities:
Accounts payable	23,723	9,953
Accrued expenses and other liabilities	37,032	46,266
Accrued warranty	6,290	6,290
Line of credit	84,500
Total current liabilities	151,545	62,509
Deferred income taxes	1,286	1,286
Non-current accrued warranty	28,285	28,709
Other long-term liabilities	2,410	2,473
Total liabilities	183,526	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, 80,000,000 shares authorized; 34,969,507 and 34,922,111 shares issued and 29,415,251 and 29,428,430 shares outstanding at March 31, 2018 and December 31, 2017, respectively	350	349
Additional paid-in capital	120,751	122,043
Retained earnings	319,480	282,370
Treasury stock, at cost, 5,543,703 and 5,493,681 shares at March 31, 2018 and December 31, 2017, respectively	(178,723)	(173,512)
Total stockholders' equity	261,858	231,250
Total liabilities and stockholders' equity	$ 445,384	$ 326,227