Derivative Financial Instruments - Summary of Derivative Positions (Details) - 12 months ended Dec. 31, 2016	USD ($) $ / £ € / £ $ / €	GBP (£) $ / £ € / £ $ / €
Interest Rate Swap
Derivative [Line Items]
Notional amount | $	$ 246,094,750
Weighted Average Remaining Maturity	3 years 10 months
Sell [Member] | USD/EURO
Derivative [Line Items]
Notional amount | $	$ 3,400,000
Weighted Average Remaining Maturity	3 months
Average Exchange Rate | $ / €	1.06	1.06
Sell [Member] | USD/British Pound
Derivative [Line Items]
Notional amount | £		£ 4,595,000
Weighted Average Remaining Maturity	3 months
Average Exchange Rate | $ / £	1.24	1.24
Sell [Member] | EURO/British Pound
Derivative [Line Items]
Notional amount | £		£ 5,700,000
Weighted Average Remaining Maturity	3 months
Average Exchange Rate | € / £	0.86	0.86