Derivative Financial Instruments - Summary of Derivative Positions (Details)	9 Months Ended
	Sep. 30, 2015 USD ($)	Sep. 30, 2015 GBP (£)
Interest Rate Swaps [Member]
Derivative [Line Items]
Notional Amount	$ 149,843,750
Weighted Average Remaining Maturity In Years	10 months
Sell [Member] | Canadian Dollar/USD [Member]
Derivative [Line Items]
Notional Amount	$ 1,039,501
Weighted Average Remaining Maturity In Years	1 month
Average Exchange Rate	1.33	1.33
Sell [Member] | Singapore Dollar/USD [Member]
Derivative [Line Items]
Notional Amount	$ 720,162
Weighted Average Remaining Maturity In Years	3 months 6 days
Average Exchange Rate	1.12	1.12
Sell [Member] | Australian Dollar/USD [Member]
Derivative [Line Items]
Notional Amount	$ 2,519,435
Weighted Average Remaining Maturity In Years	1 month
Average Exchange Rate	0.70	0.70
Sell [Member] | USD/British Pound [Member]
Derivative [Line Items]
Notional Amount | £		£ 1,900,000
Weighted Average Remaining Maturity In Years	1 month
Average Exchange Rate	1.51	1.51
Sell [Member] | EURO/British Pound [Member]
Derivative [Line Items]
Notional Amount | £		£ 8,000,000
Weighted Average Remaining Maturity In Years	2 months
Average Exchange Rate	0.74	0.74