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Earnings Per Share (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Earnings Per Share [Abstract]
Basic weighted average common shares outstanding	136,130,861	134,990,382	135,887,738	134,590,994
Effect of dilutive securities - stock options and restricted stock	1,855,038	2,436,260	1,543,827	2,829,485
Diluted weighted average common shares outstanding	137,985,899	137,426,642	137,431,565	137,420,479
Common shares issuable upon the exercise of stock options
Anti-dilutive shares excluded from the calculation of diluted earnings per share
Number of anti-dilutive shares excluded from the calculation of diluted earnings per share (in shares)	2,200,000	800,000		1,200,000

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- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period.

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