Income Taxes (Tables)

3 Months Ended

Mar. 31, 2018

Income Tax Disclosure [Abstract]

Summary of Income Tax Expense and Effective Tax Rate

Income tax expense and the effective tax rate for the three months ended March 31, 2018 and 2017 were as follows (in thousands, except the effective tax rate):

	Three Months Ended March 31,
	2018			2017
Income tax expense	$	14,621		$	17,407
Effective tax rate		9.6	%		14.0	%