Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2019	Dec. 31, 2018
Current assets:
Cash and cash equivalents	$ 81,882	$ 297,006
Accounts receivable, net	180,701	140,283
Inventories	85,398	98,913
Other current assets	13,264	8,351
Total current assets	361,245	544,553
Property, plant, and equipment, net	95,867	95,830
Operating lease assets	30,029
Goodwill	324,019	323,671
Acquired intangibles	92,930	96,375
Other assets	2,768	1,216
Total assets	906,858	1,061,645
Current liabilities:
Accounts payable	83,140	79,136
Accrued expenses	66,980	87,074
Billings in excess of cost	38,133	17,857
Current maturities of long-term debt	0	208,805
Total current liabilities	188,253	392,872
Long-term debt	0	1,600
Deferred income taxes	37,380	36,530
Non-current operating lease liabilities	21,375
Other non-current liabilities	30,303	33,950
Shareholders’ equity:
Preferred stock, $0.01 par value; authorized 10,000 shares; none outstanding	0	0
Common stock, $0.01 par value; authorized 50,000 shares; 33,101 shares and 32,887 shares issued and outstanding in 2019 and 2018	331	329
Additional paid-in capital	288,822	282,525
Retained earnings	366,835	338,995
Accumulated other comprehensive loss	(5,370)	(7,234)
Cost of 880 and 796 common shares held in treasury in 2019 and 2018	(21,071)	(17,922)
Total shareholders’ equity	629,547	596,693
Total liabilities and shareholders' equity	$ 906,858	$ 1,061,645