Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2020	Dec. 31, 2019
Current assets:
Cash and cash equivalents	$ 5,339	$ 148,833
Accounts receivable, net	241,242	78,462
Inventories	58,716	56,106
Prepaid expenses and other assets	16,582	19,803
Total current assets	321,879	303,204
Property, plant and equipment, net	193,099	171,300
Goodwill and other intangible assets, net	73,980	74,084
Operating lease assets	38,329	40,049
Other assets	3,569	3,602
Total assets	630,856	592,239
Current liabilities:
Accounts payable	28,917	15,227
Accrued expenses and other liabilities	54,355	58,265
Accrued warranty	5,178	5,178
Line of credit	28,500
Total current liabilities	116,950	78,670
Operating lease liabilities	32,440	34,242
Deferred income taxes	9,831	9,831
Non-current accrued warranty	19,912	20,317
Other long-term liabilities		4
Total liabilities	179,133	143,064
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; 70,241,911 and 70,187,463 shares issued and 57,853,160 and 58,240,721 shares outstanding at March 31, 2020 and December 31, 2019, respectively	702	702
Additional paid-in capital	123,214	123,996
Retained earnings	604,082	561,680
Treasury stock, at cost, 12,388,751 and 11,946,742 shares at March 31, 2020 and December 31, 2019, respectively	(276,275)	(237,203)
Total stockholders' equity	451,723	449,175
Total liabilities and stockholders' equity	$ 630,856	$ 592,239