Condensed Consolidated Balance Sheets (unaudited) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
Assets
Cash and cash equivalents	$ 351,167	$ 347,558
Restricted cash	5,252	16,398
Accounts receivable, net of allowance for doubtful accounts of $12,192 and $10,085, respectively	302,068	324,424
Contract assets	153,641	161,061
Inventories	363,665	314,956
Prepaid expenses and other current assets	31,777	29,566
Income taxes receivable	549	1,119
Total current assets	1,208,119	1,195,082
Property, plant and equipment, net of accumulated depreciationof $480,970 and $460,708, respectively	198,001	205,819
Operating lease right-of-use assets	74,170	76,859
Goodwill	192,116	192,116
Deferred income taxes	5,336	5,274
Other assets, net	80,293	84,724
Total assets	1,758,035	1,759,874
Current liabilities:
Current installments of long-term debt	8,912	8,825
Accounts payable	304,601	302,994
Income taxes payable	5,207	7,895
Accrued liabilities	145,900	139,531
Total current liabilities	464,620	459,245
Long-term debt, less current installments	164,664	138,912
Operating lease liabilities	64,768	67,898
Other long-term liabilities	67,848	65,483
Deferred income taxes	11,775	13,504
Shareholders' equity:
Preferred stock, $0.10 par value; 5,000 shares authorized, none issued	0	0
Common stock, $0.10 par value; 145,000 shares authorized; issued and outstanding - and outstanding - 36,461 and 36,957, respectively	3,646	3,696
Additional paid-in capital	508,555	512,019
Retained earnings	493,451	515,876
Accumulated other comprehensive loss	(21,292)	(16,759)
Total shareholders' equity	984,360	1,014,832
Commitments and contingencies
Total liabilities and shareholders' equity	$ 1,758,035	$ 1,759,874