Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2015

Earnings Per Share [Abstract]

Schedule Computing Earnings Per Share

	Three months ended March 31,
(in thousands, except market price and earnings per share)	2015		2014
Net income attributable to the Company	$	12,213	$	10,621
Weighted average number of shares:
Weighted average number of shares used in
calculating basic net income per share		31,882		31,786
Effect of dilutive stock-based compensation plans:
Stock options		90		106
Weighted average number of shares used in
calculating diluted net income per share		31,972		31,892
Average market price of common stock used
for calculation of dilutive shares	$	37.36	$	35.68
Earnings per share attributable to Company shareholders:
Basic	$	0.38	$	0.33
Diluted	$	0.38	$	0.33