Derivative Financial Instruments - Summary of Derivative Positions (Details)	3 Months Ended
	Mar. 31, 2016 USD ($)	Mar. 31, 2016 GBP (£)
Canadian Dollar/USD | Sell
Derivative [Line Items]
Notional Amount | $	$ 3,704,127
Weighted Average Remaining Maturity In Years	2 months
Average Exchange Rate	1.30	1.30
USD/British Pound | Sell
Derivative [Line Items]
Notional Amount | £		£ 4,595,000
Weighted Average Remaining Maturity In Years	2 months 15 days
Average Exchange Rate	1.44	1.44
EURO/British Pound | Sell
Derivative [Line Items]
Notional Amount | £		£ 8,000,000
Weighted Average Remaining Maturity In Years	2 months 15 days
Average Exchange Rate	0.79	0.79
Interest Rate Swaps
Derivative [Line Items]
Notional Amount | $	$ 255,937,500
Weighted Average Remaining Maturity In Years	4 years 7 months