Selected Quarterly Financial Data (Tables)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Financial Data

	2017
Quarter	First			Second			Third			Fourth			Year
Net Sales	$	468,269		$	495,101		$	487,814		$	473,823		$	1,925,007
Gross Profit		92,098			89,966			75,602			80,599			338,265
Operating Income		46,059			38,961			30,309			30,831			146,160
Interest, net		(2,992	)		(2,863	)		(2,763	)		(2,826	)		(11,444	)
Income Before Income Taxes		44,330			37,063			29,312			28,532			139,237
Net Income		31,912			27,896			21,853			9,886			91,547
Net Income Attributable to Stepan Company		31,913			27,882			21,899			9,884			91,578
Per Diluted Share		1.37			1.19			0.94			0.42			3.92

	2016
Quarter	First			Second			Third			Fourth			Year
Net Sales	$	445,897		$	454,603		$	445,030		$	420,636		$	1,766,166
Gross Profit		93,499			92,931			83,395			68,720			338,545
Operating Income		44,607			42,916			28,738			9,932			126,193
Interest, net		(3,614	)		(3,417	)		(2,824	)		(3,350	)		(13,205	)
Income Before Income Taxes		40,468			39,196			27,143			7,009			113,816
Net Income		27,919			28,501			21,367			8,411			86,198
Net Income Attributable to Stepan Company		27,916			28,496			21,362			8,417			86,191
Per Diluted Share		1.22			1.24			0.92			0.36			3.73