Accumulated Other Comprehensive Loss (Details) (USD $)	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance	$ (1,889,996)	$ (1,616,074)	$ (1,762,387)	$ (1,650,050)
Other comprehensive (loss) income
Other comprehensive (loss) income before reclassifications	(9,370)	(20,524)	(140,169)	11,310
Amounts reclassified from accumulated other comprehensive (loss) income	3,231	(1,058)	6,421	1,084
Total other comprehensive (loss) income, net of taxes:	(6,139)	(21,582)	(133,748)	12,394
Accumulated other comprehensive (loss) income, ending balance	(1,896,135)	(1,637,656)	(1,896,135)	(1,637,656)
Foreign Currency Translation
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance	(1,820,191)	(1,566,611)	(1,693,905)	(1,601,138)
Other comprehensive (loss) income
Other comprehensive (loss) income before reclassifications	(12,184)	(19,737)	(138,470)	14,790
Amounts reclassified from accumulated other comprehensive (loss) income	0	0	0	0
Total other comprehensive (loss) income, net of taxes:	(12,184)	(19,737)	(138,470)	14,790
Accumulated other comprehensive (loss) income, ending balance	(1,832,375)	(1,586,348)	(1,832,375)	(1,586,348)
Net Unrealized Gains On Marketable Securities
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance	1,595	10,217	3,410	6,210
Other comprehensive (loss) income
Other comprehensive (loss) income before reclassifications	2,433	(2,258)	618	1,749
Amounts reclassified from accumulated other comprehensive (loss) income	0	(3,199)	0	(3,199)
Total other comprehensive (loss) income, net of taxes:	2,433	(5,457)	618	(1,450)
Accumulated other comprehensive (loss) income, ending balance	4,028	4,760	4,028	4,760
Net Minimum Pension Liability
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Accumulated other comprehensive (loss) income, beginning balance	(71,400)	(59,680)	(71,892)	(55,122)
Other comprehensive (loss) income
Other comprehensive (loss) income before reclassifications	381	1,471	(2,317)	(5,229)
Amounts reclassified from accumulated other comprehensive (loss) income	3,231	2,141	6,421	4,283
Total other comprehensive (loss) income, net of taxes:	3,612	3,612	4,104	(946)
Accumulated other comprehensive (loss) income, ending balance	$ (67,788)	$ (56,068)	$ (67,788)	$ (56,068)