Provision for Income Taxes (Tables)

3 Months Ended

Mar. 31, 2017

Income Tax Disclosure [Abstract]

Provision for Income Taxes

	Three months ended
	March 31,
	2016			2017
	(In thousands)
Expected tax expense, at the U.S. federal statutory    income tax rate of 35%	$	1,185		$	1,701
Domestic production activities deduction		(105	)		(145	)
State income taxes		98			132
Other, net		7			20
Total income tax expense	$	1,185		$	1,708