Share Information - Earnings Per Share Calculation, Share Information (Details) - shares	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Earnings Per Share [Abstract]
Weighted average number of common shares used for basic EPS (in shares)	35,488,580	37,309,829
Effect of dilutive stock options and restricted and deferred stock unit awards (in shares)	0	231,720
Weighted average number of common shares and dilutive potential common stock used in dilutive EPS (in shares)	35,488,580	37,541,549