Stock-Based Compensation (Tables)

3 Months Ended

Mar. 31, 2013

Disclosure of Compensation Related Costs, Share-based Payments [Abstract]

Summary of Compensation Expense and Related Tax Benefits

The following table presents compensation expense and the related tax benefits for equity awards recognized in the consolidated statements of income:

	Three months ended March 31
	2013			2012
	(in thousands)
Stock-based compensation expense	$	847		$	713
Tax benefit	(224		)	(159		)
Stock-based compensation expense, net of tax	$	623		$	554