Fair Value Measurements - Level 3 Reconciliation (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended	3 Months Ended	12 Months Ended
	Mar. 31, 2014 Contingent consideration [Member]	Dec. 31, 2012 Contingent consideration [Member]	Mar. 31, 2014 Deferred acquisition payments, net of discount [Member]	Dec. 31, 2012 Deferred acquisition payments, net of discount [Member]	Mar. 31, 2014 Embedded conversion option [Member]	Dec. 31, 2012 Embedded conversion option [Member]	Dec. 31, 2012 Common stock options/warrants [Member]	Dec. 31, 2013 Common stock options/warrants [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance, assets							$ 2,040	$ 0
Additions, assets							0
Total losses (gains) for the period:
Included in results of operations, assets							0
Included in Other comprehensive loss, assets		0		0		1,199	(2,040)
Transfer out to equity method investment, assets		(3,124)		(5,448)		0	0
Ending Balance, assets								0
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning Balance, liabilities	71,620	20,056	5,484	10,103	101,087	0
Additions, liabilities		47,710		0		59,204
Total losses (gains) for the period:
Included in results of operations, liabilities	2,610	6,947		829	11,112	43,082
Payments	(3,214)		(4,644)
Foreign currency impact		31
Ending Balance, liabilities	$ 71,016		$ 840		$ 112,199