Derivative Financial Intstruments - Summary of Outstanding Swaps (Details) - USD ($)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Derivatives, Fair Value [Line Items]
Assets, at Fair Value	$ 10,365,000	$ 669,000
Liabilities, at Fair Value	1,982,000	$ 0
Interest Rate Swap [Member] | 3-5 Years
Derivatives, Fair Value [Line Items]
Notional Amount	$ 700,000,000
DerivativeAverageFixedInterestRate	1.20%
Derivative, Average Variable Interest Rate	0.91%
Assets, at Fair Value	$ 9,500,000
Derivative Average Remaining Maturity	3 years 4 months 17 days