Employee Benefit Plans (Details 10) (USD $)	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2014 Level 1	Mar. 31, 2013 Level 1	Mar. 31, 2014 Level 2	Mar. 31, 2013 Level 2	Mar. 31, 2014 Level 3	Mar. 31, 2014 Total	Mar. 31, 2013 Total	Mar. 31, 2014 Equity securities Level 1	Mar. 31, 2013 Equity securities Level 1	Mar. 31, 2014 Equity securities Total	Mar. 31, 2013 Equity securities Total	Mar. 31, 2014 Cash Level 1	Mar. 31, 2013 Cash Level 1	Mar. 31, 2014 Cash Total	Mar. 31, 2013 Cash Total	Mar. 31, 2014 Debt securities Level 1	Mar. 31, 2013 Debt securities Level 1	Mar. 31, 2014 Debt securities Total	Mar. 31, 2013 Debt securities Total	Mar. 31, 2014 Swiss real estate fund Level 1	Mar. 31, 2013 Swiss real estate fund Level 1	Mar. 31, 2014 Swiss real estate fund Total	Mar. 31, 2013 Swiss real estate fund Total	Mar. 31, 2014 Hedge funds Level 2	Mar. 31, 2013 Hedge funds Level 2	Mar. 31, 2014 Hedge funds Total	Mar. 31, 2013 Hedge funds Total	Mar. 31, 2013 Commodity funds Level 1	Mar. 31, 2013 Commodity funds Total	Mar. 31, 2014 Insurance contracts Level 3	Mar. 31, 2014 Insurance contracts Total	Mar. 31, 2014 Other Level 1	Mar. 31, 2013 Other Level 1	Mar. 31, 2014 Other Level 2	Mar. 31, 2013 Other Level 2	Mar. 31, 2014 Other Total	Mar. 31, 2013 Other Total	Mar. 31, 2014 Swiss Plan Equity securities Minimum	Dec. 31, 2013 Swiss Plan Equity securities Minimum	Mar. 31, 2014 Swiss Plan Equity securities Maximum	Dec. 31, 2013 Swiss Plan Equity securities Maximum	Dec. 31, 2013 Swiss Plan Bonds Minimum	Dec. 31, 2013 Swiss Plan Bonds Maximum	Mar. 31, 2014 Swiss Plan Swiss bonds Minimum	Mar. 31, 2014 Swiss Plan Swiss bonds Maximum	Mar. 31, 2014 Swiss Plan Foreign bonds Minimum	Mar. 31, 2014 Swiss Plan Foreign bonds Maximum	Mar. 31, 2014 Swiss Plan Hedge and investment funds Minimum	Mar. 31, 2014 Swiss Plan Hedge and investment funds Maximum	Mar. 31, 2014 Swiss Plan Cash and cash equivalents Minimum	Dec. 31, 2013 Swiss Plan Cash and cash equivalents Minimum	Mar. 31, 2014 Swiss Plan Cash and cash equivalents Maximum	Dec. 31, 2013 Swiss Plan Cash and cash equivalents Maximum	Mar. 31, 2014 Other defined benefit plans
Defined benefit plans
Plan assets allocation (as a percent)																																									28.00%	20.00%	43.00%	55.00%	25.00%	60.00%	33.00%	63.00%	5.00%	15.00%	5.00%	15.00%	0.00%	0.00%	20.00%	10.00%
Percentage of asset to total																																																									6.20%
Plan assets at fair value	$ 63,384,000	$ 48,689,000	$ 53,594,000	$ 56,976,000	$ 47,375,000	$ 3,810,000	$ 1,314,000	$ 2,598,000	$ 63,384,000	$ 48,689,000	$ 17,324,000	$ 14,802,000	$ 17,324,000	$ 14,802,000	$ 10,339,000	$ 7,143,000	$ 10,339,000	$ 7,143,000	$ 20,300,000	$ 20,663,000	$ 20,300,000	$ 20,663,000	$ 8,970,000	$ 3,968,000	$ 8,970,000	$ 3,968,000	$ 3,611,000	$ 1,062,000	$ 3,611,000	$ 1,062,000	$ 693,000	$ 693,000	$ 2,598,000	$ 2,598,000	$ 43,000	$ 106,000	$ 199,000	$ 252,000	$ 242,000	$ 358,000
Projected benefit obligations that exceeded plan assets	$ (39,000,000)	$ (41,500,000)