Derivative Instruments (Interest Rate Derivatives) (Details)				9 Months Ended
	Sep. 30, 2013 USD ($)		Sep. 30, 2013 JPY (¥)	Sep. 30, 2013 Swap 3 [Member] USD ($)		Sep. 30, 2013 Swap 3 [Member] JPY (¥)
Derivative [Line Items]
Effective Date				Mar. 15, 2009		Mar. 15, 2009
Termination Date				Sep. 15, 2020		Sep. 15, 2020
Current Notional Amount	$ 51,140,065	[1]		$ 51,140,065	[1]
Swap Rate				2.065%		2.065%
Type				Variable-to-Fixed		Variable-to-Fixed
Exchange rate			98.24			98.24

[1] Notional amount converted from Yen at September 30, 2013 at a Yen to USD exchange rate of 98.24