SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) (Tables)

12 Months Ended

Dec. 31, 2017

Quarterly Financial Information Disclosure [Abstract]

Selected Quarterly Financial Data

	First		Second		Third		Fourth
In thousands, except per share data	Quarter		Quarter		Quarter		Quarter (1)
2017
Net sales	$	916,034	$	932,253	$	957,931	$	1,075,538
Gross profit	269,707		273,963		253,203		268,440
Income from operations	114,858		113,701		102,011		91,163
Net income attributable to Wabtec shareholders	73,889		72,025		67,399		48,948
Basic earnings from operations per common share	$	0.77	$	0.75	$	0.70	$	0.51
Diluted earnings from operations per common share	$	0.77	$	0.75	$	0.70	$	0.51
2016
Net sales	$	772,031	$	723,601	$	675,574	$	759,982
Gross profit	255,180		237,389		212,481		219,189
Income from operations	142,181		133,284		120,096		62,800
Net income attributable to Wabtec shareholders	94,163		90,485		82,428		46,328
Basic earnings from operations per common share	$	1.03	$	1.00	$	0.92	$	0.42
Diluted earnings from operations per common share	$	1.02	$	1.00	$	0.91	$	0.42