Consolidated Balance Sheets - USD ($) $ in Thousands	Dec. 31, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 148,833	$ 105,699
Accounts receivable, net	78,462	91,163
Inventories	56,106	57,801
Prepaid expenses and other assets	19,803	15,562
Total current assets	303,204	270,225
Property, plant and equipment, net	171,300	117,144
Goodwill and other intangible assets, net	74,084	74,503
Operating lease assets	40,049	0
Other assets	3,602	3,250
Total assets	592,239	465,122
Current liabilities:
Accounts payable	15,227	31,084
Accrued expenses and other liabilities	58,265	56,291
Accrued warranty	5,178	5,400
Total current liabilities	78,670	92,775
Operating lease liabilities	34,242	0
Deferred income taxes	9,831	2,125
Non-current accrued warranty	20,317	25,354
Other long-term liabilities	4	1,905
Total liabilities	143,064	122,159
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; 70,187,463 and 69,998,336 shares issued and 58,240,721 and 58,551,653 shares outstanding at December 31, 2019 and 2018, respectively	702	700
Additional paid-in capital	123,996	124,224
Retained earnings	561,680	416,942
Treasury stock, at cost, 11,946,742 and 11,446,683 shares at December 31, 2019 and 2018, respectively	(237,203)	(198,903)
Total stockholders' equity	449,175	342,963
Total liabilities and stockholders' equity	$ 592,239	$ 465,122