Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current assets:
Cash and cash equivalents	$ 200,741	$ 222,280
Accounts receivable, net	145,182	145,385
Inventories	90,236	86,372
Other current assets	6,712	8,727
Total current assets	442,871	462,764
Property, plant, and equipment, net	93,671	97,098
Goodwill	321,772	321,074
Acquired intangibles	104,059	105,768
Other assets	4,770	4,681
Total assets	967,143	991,385
Current liabilities:
Accounts payable	80,691	82,387
Accrued expenses	53,254	75,467
Billings in excess of cost	11,572	12,779
Current maturities of long-term debt	400	400
Total current liabilities	145,917	171,033
Long-term debt	209,817	209,621
Deferred income taxes	31,339	31,237
Other non-current liabilities	38,115	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; 32,398 shares and 32,332 shares issued and outstanding in 2018 and 2017	324	323
Additional paid-in capital	274,279	271,957
Retained earnings	283,538	274,562
Accumulated other comprehensive loss	(4,579)	(4,366)
Cost of 639 and 615 common shares held in treasury in 2018 and 2017	(11,607)	(10,757)
Total shareholders’ equity	541,955	531,719
Total liabilities and shareholders' equity	$ 967,143	$ 991,385