Provision for income taxes (Tables)

3 Months Ended

Mar. 31, 2013

Income Tax Disclosure [Abstract]

Provision for Income Taxes

	Three months ended March 31,
	2012		2013
	(In thousands)
Expected tax expense, at the U.S. federal statutory income tax rate of 35%	$	512	$	487
State income taxes and other, net		87		9
Total income tax expense	$	599	$	496