CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Sep. 30, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents	$ 245,917	$ 475,120
Receivables, net	615,398	494,923
Inventories, net	429,267	378,866
Other current assets	55,752	52,951
Total current assets	1,346,334	1,401,860
Property, plant, and equipment, net	369,996	390,235
Goodwill	1,097,268	1,096,329
Other intangible assets, net	442,295	329,668
Other assets	20,178	18,229
Total assets	3,276,071	3,236,321
Current liabilities:
Current portion of long-term debt and short-term debt	1,023	150
Accounts payable	176,350	185,176
Accrued expenses	141,849	150,406
Income taxes payable	5,787	4,564
Deferred revenue	223,686	214,891
Other current liabilities	48,747	35,810
Total current liabilities	597,442	590,997
Long-term debt	812,731	813,989
Deferred tax liabilities, net	56,862	49,360
Accrued pension and other postretirement benefit costs	63,141	121,043
Long-term portion of environmental reserves	15,087	14,546
Other liabilities	109,531	118,586
Total liabilities	1,654,794	1,708,521
Stockholders' Equity
Common stock, $1 par value, 100,000,000 shares authorized as of September 30, 2018 and December 31, 2017; 49,187,378 shares issued as of September 30, 2018 and December 31, 2017; outstanding shares were 43,790,207 as of September 30, 2018 and 44,123,519 as of December 31, 2017	49,187	49,187
Additional paid in capital	123,193	120,609
Retained earnings	2,115,166	1,944,324
Accumulated other comprehensive loss	(238,288)	(216,840)
Common treasury stock, at cost (5,397,171 shares as of September 30, 2018 and 5,063,859 shares as of December 31, 2017)	(427,981)	(369,480)
Total stockholders' equity	1,621,277	1,527,800
Total liabilities and stockholders' equity	$ 3,276,071	$ 3,236,321