Condensed Consolidated Balance Sheets - USD ($) $ in Thousands	Mar. 31, 2018	Dec. 31, 2017
Current Assets:
Cash and cash equivalents	$ 244,581	$ 298,894
Receivables, net	325,276	293,541
Inventories (Note 6)	187,737	172,748
Other current assets	24,416	23,553
Total current assets	782,010	788,736
Property, Plant and Equipment:
Cost	1,642,783	1,603,286
Less: Accumulated depreciation	(1,026,732)	(1,004,843)
Property, plant and equipment, net	616,051	598,443
Goodwill, net	25,113	25,118
Other intangible assets, net	17,731	18,538
Long-term investments (Note 3)	26,725	28,270
Other non-current assets	13,003	11,756
Total assets	1,480,633	1,470,861
Current Liabilities:
Current maturities of long-term debt (Note 13)	22,640	22,500
Accounts payable	202,432	204,977
Accrued liabilities	74,482	92,776
Total current liabilities	299,554	320,253
Deferred income taxes	11,932	10,962
Long-term debt, less current maturities (Notes 13)	268,173	268,299
Other non-current liabilities	125,548	130,433
Commitments and Contingencies (Note 7)
Equity:
Common stock, $1 par value; authorized 60,000,000 shares; issued 26,268,311 shares in 2018 and 26,070,787 shares in 2017	26,268	26,071
Additional paid-in capital	175,211	170,408
Accumulated other comprehensive loss (Note 10)	(90,028)	(99,563)
Retained earnings	747,174	721,741
Less: Common treasury stock, at cost, 3,622,533 shares in 2018 and 3,561,509 shares in 2017	(84,042)	(78,561)
Total Stepan Company stockholders’ equity	774,583	740,096
Noncontrolling interests (Note 2)	843	818
Total equity	775,426	740,914
Total liabilities and equity	$ 1,480,633	$ 1,470,861