Defined Benefit Pension and Other Postretirement Benefit Plans (Details) (USD $)	3 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Europe
Defined Benefit Plan Disclosure
Number of defined benefit pension plans	6
Singapore
Defined Benefit Plan Disclosure
Number of defined benefit pension plans	1
Mexico
Defined Benefit Plan Disclosure
Number of defined benefit pension plans	2
Defined benefit pension plans
Net periodic benefit (income) costs
Net service cost	$ 331,000	$ 414,000
Interest cost	428,000	494,000
Expected return on net assets	(109,000)	(172,000)
Amortization:
Actuarial (gain) loss	78,000	130,000
Prior service cost	1,000	6,000
Total net periodic benefit (income) costs	729,000	872,000
Contribution by employer	300,000
Defined benefit pension plans | Maximum
Amortization:
Estimated employer contribution in current fiscal year	1,600,000
Defined benefit postretirement pension plan
Net periodic benefit (income) costs
Interest cost	5,000	9,000
Amortization:
Actuarial (gain) loss	(70,000)	(72,000)
Total net periodic benefit (income) costs	$ (65,000)	$ (63,000)