Earnings Per Share (Details) - shares	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Schedule of weighted average shares outstanding [Abstract]
Basic shares outstanding (in shares)	101,885,000	101,071,000
Effect of potential common stock [Abstract]
Common stock awards (in shares)	1,193,000	1,172,000
Senior subordinated convertible notes (in shares)	0	75,000
Diluted shares outstanding (in shares)	103,078,000	102,318,000
Stock Options [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive stock options (in shares)	661,525	988,475