Income Taxes (Tables)

3 Months Ended

Mar. 31, 2018

Income Tax Disclosure [Abstract]

Summary of Tax Expense and Effective Tax Rates

Income tax expense and effective tax rates were:

	Three Months Ended March 31,
	2018			2017
	(in thousands, except effective tax rate)
Income before income taxes	$	27,212		$	15,948
Income tax expense	10,758			4,938
Effective tax rate	39.5		%	31.0		%