Defined Benefit Pension and Other Postretirement Benefit Plans (Details) (USD $)	1 Months Ended	3 Months Ended		9 Months Ended
	Jul. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2011
Net periodic benefit costs
Curtailment loss on benefit plans		$ 587,000
Amortization:
Net curtailment and settlement (gain) loss on benefit plans		587,000		(1,088,000)
Defined benefit pension plans
Net periodic benefit costs
Settlement gain on benefit plans	1,700,000
Net service cost		353,000	331,000	1,182,000	994,000
Interest cost		436,000	533,000	1,424,000	1,600,000
Expected return on net assets		(149,000)	(175,000)	(493,000)	(525,000)
Amortization:
Actuarial (gain) loss		137,000	96,000	397,000	287,000
Prior service cost		3,000	6,000	15,000	18,000
Net curtailment and settlement (gain) loss on benefit plans		587,000		(1,088,000)
Total net periodic benefit (income) costs		1,367,000	791,000	1,437,000	2,374,000
Estimated employer contribution in current fiscal year		2,400,000		2,400,000
Contribution by employer				1,800,000
Defined benefit pension plans | Minimum
Amortization:
Percentage of pension liability paid upon retirement	20.00%
Defined benefit pension plans | Europe
Amortization:
Number of defined benefit pension plans				7
Defined benefit pension plans | Singapore
Amortization:
Number of defined benefit pension plans				1
Defined benefit pension plans | Mexico
Amortization:
Number of defined benefit pension plans				2
Defined benefit postretirement pension plan
Net periodic benefit costs
Interest cost		7,000	11,000	21,000	33,000
Amortization:
Actuarial (gain) loss		(82,000)	(81,000)	(243,000)	(243,000)
Total net periodic benefit (income) costs		$ (75,000)	$ (70,000)	$ (222,000)	$ (210,000)