Summary of Significant Accounting Policies (Details 3) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Changes in accumulated other comprehensive (loss) income by component
Accumulated Other Comprehensive (Loss) Income			$ 28,520,000
Total other comprehensive income (loss), net of tax	9,767,000	(29,026,000)	(32,099,000)	(12,606,000)
Accumulated Other Comprehensive (Loss) Income	(3,579,000)		(3,579,000)
Amortization of actuarial losses and prior service credits to net periodic pension cost, before tax			700,000
Amortization of actuarial losses and prior service credits to net periodic pension cost, amount of tax			200,000
BioClinica, Inc.
Changes in accumulated other comprehensive (loss) income by component
Amount reclassified from accumulated other comprehensive income before tax			15,700,000
Amount reclassified from accumulated other comprehensive income, tax			5,500,000
Accumulated Other Comprehensive Income (Loss)
Changes in accumulated other comprehensive (loss) income by component
Accumulated Other Comprehensive (Loss) Income			28,520,000
Other comprehensive (loss) income, net of tax, before reclassifications			(22,373,000)
Amounts reclassified from accumulated other comprehensive (loss) income, net of tax			(9,726,000)
Total other comprehensive income (loss), net of tax			(32,099,000)
Accumulated Other Comprehensive (Loss) Income	(3,579,000)		(3,579,000)
Foreign Currency Translation Adjustments
Changes in accumulated other comprehensive (loss) income by component
Accumulated Other Comprehensive (Loss) Income			52,070,000
Other comprehensive (loss) income, net of tax, before reclassifications			(25,149,000)
Total other comprehensive income (loss), net of tax			(25,149,000)
Accumulated Other Comprehensive (Loss) Income	26,921,000		26,921,000
Unrealized gain on available for sale securities
Changes in accumulated other comprehensive (loss) income by component
Accumulated Other Comprehensive (Loss) Income			7,418,000
Other comprehensive (loss) income, net of tax, before reclassifications			2,776,000
Amounts reclassified from accumulated other comprehensive (loss) income, net of tax			(10,194,000)
Total other comprehensive income (loss), net of tax			(7,418,000)
Defined Benefit Plans
Changes in accumulated other comprehensive (loss) income by component
Accumulated Other Comprehensive (Loss) Income			(30,968,000)
Amounts reclassified from accumulated other comprehensive (loss) income, net of tax			468,000
Total other comprehensive income (loss), net of tax			468,000
Accumulated Other Comprehensive (Loss) Income	$ (30,500,000)		$ (30,500,000)