Acquisitions (Details) (KIESTRA Lab Automation BV [Member], USD $) In Thousands, unless otherwise specified	Mar. 31, 2012	Feb. 09, 2012
KIESTRA Lab Automation BV [Member]
Fair value of assets and liabilities assumed
Core and developed technology	$ 12,581
Acquired in-process research and development	7,416
Other intangibles	4,767
Property, plant and equipment	5,373
Other	10,348
Total identifiable assets acquired	40,485
Deferred tax liabilities	(6,191)
Other	(8,357)
Total liabilities assumed	(14,548)
Net identifiable assets acquired	25,937
Goodwill	33,520
Net assets acquired	$ 59,457	$ (59,457)