Fair Value Measurements - Narrative (Details) (USD $)	3 Months Ended	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Other Long-term Obligations	Dec. 31, 2012 Other Long-term Obligations	Dec. 31, 2013 Accrued Liabilities	Dec. 31, 2012 Accrued Liabilities	Sep. 30, 2013 Ostial Solutions, LLC Developed technology	Sep. 30, 2013 Ostial Solutions, LLC Other
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Contingent consideration liability					$ 2,300,000	$ 5,900,000
Contingent consideration liability							274,000	723,000
Other Asset Impairment Charges		8,208,000	55,000	103,000
Goodwill impairment charge		8,089,000
Finite-lived Intangible Assets, Fair Value Disclosure									1,500,000	160,000
Impairment of cost-method investment	$ 2,368,000	$ 0	$ 2,368,000	$ 0