Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Sep. 30, 2017	Dec. 31, 2016
Current assets:
Cash and cash equivalents	$ 25,541	$ 18,664
Accounts receivable, net	70,802	48,039
Contract retainage	1,893
Inventories	26,029	28,546
Prepaid expenses and other assets	3,912	10,400
Revenues in excess of billings	4,706
Total current assets	132,883	105,649
Property, plant and equipment, net	102,788	103,286
Goodwill and other intangibles	72,544	10,523
Other assets	2,981	1,972
Total assets	311,196	221,430
Current liabilities:
Accounts payable	15,960	10,767
Accrued expenses and other liabilities	41,327	34,693
Accrued warranty	6,725	5,925
Billings in excess of revenues	1,353
Customer deposits	953
Total current liabilities	66,318	51,385
Deferred income taxes	894	894
Non-current accrued warranty	29,733	31,767
Other long-term liabilities	2,676	3,223
Total liabilities	99,621	87,269
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; 34,918,427 and 34,894,233 shares issued and 29,424,746 and 29,400,552 shares outstanding at September 30, 2017 and December 31, 2016, respectively	349	349
Additional paid-in capital	120,667	120,082
Retained earnings	264,071	187,242
Treasury stock, at cost, 5,493,681 shares at September 30, 2017 and December 31, 2016	(173,512)	(173,512)
Total stockholders' equity	211,575	134,161
Total liabilities and stockholders' equity	$ 311,196	$ 221,430