Derivative Financial Instruments - Summary of Derivative Positions (Details)	6 Months Ended	12 Months Ended
	Jun. 30, 2016 USD ($)	Dec. 31, 2015 EUR (€)	Jun. 30, 2016 GBP (£)
Canadian Dollar/USD | Sell
Derivative [Line Items]
Notional Amount | $	$ 1,429,392
Weighted Average Remaining Maturity In Years	1 month
Average Exchange Rate	1.29		1.29
USD/EURO | Sell
Derivative [Line Items]
Notional Amount | €		€ 3,641,000
Weighted Average Remaining Maturity In Years		6 months
Average Exchange Rate		1.12
USD/British Pound | Sell
Derivative [Line Items]
Notional Amount | £			£ 4,595,000
Weighted Average Remaining Maturity In Years	6 months
Average Exchange Rate	1.36		1.36
EURO/British Pound | Sell
Derivative [Line Items]
Notional Amount | £			£ 8,000,000
Weighted Average Remaining Maturity In Years	6 months
Average Exchange Rate	0.84		0.84
Interest Rate Swaps
Derivative [Line Items]
Notional Amount | $	$ 252,656,250
Weighted Average Remaining Maturity In Years	4 years 4 months