Earnings Per Share (Tables)

9 Months Ended

Sep. 30, 2014

Earnings Per Share [Abstract]

Components of Basic and Diluted Earnings Per Share

The components of basic and diluted earnings per share for the quarter and nine months ended September 30, 2014 and 2013 are as follows:

	Quarter Ended September 30,				Nine Months Ended September 30,
	2014		2013		2014		2013
			(Thousands of dollars)
Weighted average outstanding shares of common stock, basic		15,483		15,474		15,483		15,474
Dilutive effect of unvested restricted stock units		244		165		163		143
Weighted average outstanding shares of common stock, diluted		15,727		15,639		15,646		15,617