Earnings Per Share (Details) - shares	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount			445,036
Weighted Average Number of Shares Outstanding Reconciliation
Weighted average number of common shares outstanding used to compute basic earnings per share	53,422,000	51,978,000	53,284,000	51,749,000
Dilutive effect of stock-based awards	489,000	655,000	499,000	686,000
Number of shares used to compute diluted earnings per share	53,911,000	52,633,000	53,783,000	52,435,000