8. Savings and Retirement Plans

We sponsor various retirement plans for eligible employees in the United States, the United Kingdom (UK), and The Netherlands. Our retirement savings plan in the United States conforms to Section 401(k) of the Internal Revenue Code and participation is available to substantially all employees. We may also make discretionary contributions ratably to all eligible employees. We made discretionary contributions to the U.S. plan of $42 and $43 for the three months ended December 31, 2013 and 2012, respectively. We made discretionary contributions to the U.S. plan of $155 and $164 for the nine months ended December 31, 2013 and 2012, respectively.

Our international subsidiaries have defined benefit retirement plans for eligible employees. These plans provide benefits based on the employee’s years of service and compensation during the years immediately preceding retirement, termination, disability, or death, as defined in the plans.

The cost for our defined benefit retirement plans in The Netherlands and the United Kingdom includes the following components for the three- and nine-month periods ended December 31:

	Three Months Ended December 31						Nine Months Ended December 31
	2013			2012			2013			2012

Gross service cost	$	32		$	19		$	95		$	55
Interest cost		36			31			104			92
Expected return on assets		(21	)		(5	)		(61	)		(14	)
Amortization		2			1			5			4
Net periodic retirement cost	$	49		$	46		$	143		$	137