Consolidated Balance Sheets - USD ($) $ in Thousands	Jun. 30, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 210,743	$ 222,280
Accounts receivable, net	171,642	145,385
Inventories	95,694	86,372
Other current assets	11,594	8,727
Total current assets	489,673	462,764
Property, plant, and equipment, net	93,221	97,098
Goodwill	320,875	321,074
Acquired intangibles	101,554	105,768
Other assets	4,597	4,681
Total assets	1,009,920	991,385
Current liabilities:
Accounts payable	88,547	82,387
Accrued expenses	65,174	75,467
Billings in excess of cost	15,527	12,779
Current maturities of long-term debt	400	400
Total current liabilities	169,648	171,033
Long-term debt	209,613	209,621
Deferred income taxes	31,196	31,237
Other non-current liabilities	38,567	47,775
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; 32,755 shares and 32,332 shares issued and outstanding in 2018 and 2017	327	323
Additional paid-in capital	277,307	271,957
Retained earnings	306,375	274,562
Accumulated other comprehensive loss	(6,340)	(4,366)
Cost of 767 and 615 common shares held in treasury in 2018 and 2017	(16,773)	(10,757)
Total shareholders’ equity	560,896	531,719
Total liabilities and shareholders' equity	$ 1,009,920	$ 991,385