Summary of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2014

Accounting Policies [Abstract]

Computation of Basic EPS to Dilutive EPS

The following table reconciles the computation of basic EPS to dilutive EPS:

	Net Earnings (in thousands)		Weighted Average Shares		Per Share Amount
For the year ended December 31, 2014:
Net earnings per share, basic	$	89,559		64,047,803	$	1.40
Effect of stock options		—		260,732		(0.01	)
Net earnings per share, assuming dilution	$	89,559		64,308,535	$	1.39
For the year ended December 31, 2013:
Net earnings per share, basic	$	78,868		63,575,948	$	1.24
Effect of stock options		—		280,816		—
Net earnings per share, assuming dilution	$	78,868		63,856,764	$	1.24
For the year ended December 31, 2012:
Net earnings per share, basic	$	74,225		62,960,310	$	1.18
Effect of stock options		—		42,224		—
Net earnings per share, assuming dilution	$	74,225		63,002,534	$	1.18