Quarterly Information (Unaudited) (Narrative) (Details) (USD $)	12 Months Ended			3 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Jun. 30, 2013 Resolved Litigation [Member] Sintel [Member]	Sep. 30, 2012 Pending Litigation [Member] Sintel [Member]	Mar. 31, 2013 Senior Notes [Member] 7.625% Senior Notes [Member] Unsecured Debt [Member]
Quarterly Information (Unaudited) [Line Items]
Quarterly financial information, explanatory disclosure	During the years ended December 31, 2013 and 2012, the Company acquired certain businesses. In addition, the Company sold its Globetec business in 2013 and its DirectStar business in 2012. As a result, the quarterly results of 2013 may not be comparable with those of 2012. Other transactions affecting comparisons of the Company's quarterly results include: (i) $5.6 million of debt extinguishment charges that were recorded in the first quarter of 2013; (ii) $2.8 million of Sintel legal settlement charges that were recorded in the second quarter of 2013; and (iii) $9.6 million of Sintel legal settlement charges that were recorded in the third quarter of 2012.
Legal settlement charges				$ 2,800,000	$ 9,600,000
Loss on extinguishment of debt	$ 5,624,000	$ 0	$ 0			$ 5,600,000