Earnings per Share (Details) - shares shares in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Earnings Per Share [Abstract]
Weighted average basic common shares outstanding	42,517	44,152	42,879	44,571
Performance shares (in shares)	114	121	95	110
Restricted stock (in shares)	54	108	64	142
Weighted average diluted common and potential common shares outstanding	42,685	44,381	43,038	44,823