Aggregate notional amount specified by the derivative(s). Expressed as an absolute value.

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Derivative Financial Instruments - Schedule of Derivatives (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Feb. 07, 2017	Dec. 31, 2016
Derivatives
Notional Amount	$ 326,214,000			$ 326,901,000
Asset, Fair Value	479,000			259,000
Liability, Fair Value	(568,000)			(829,000)
Changes in fair value of derivatives
Change in fair value of interest rate derivatives	294,000	$ (2,389,000)
Total change in fair value	294,000	(2,389,000)
Interest rate swaps
Derivatives
Notional Amount	56,214,000			56,901,000
Asset, Fair Value	0			0
Liability, Fair Value	(568,000)			(829,000)
Changes in fair value of derivatives
Total change in fair value	261,000	(2,244,000)
Interest rate caps
Derivatives
Notional Amount	270,000,000		$ 50,000,000.0	270,000,000
Asset, Fair Value	479,000			259,000
Liability, Fair Value	0			$ 0
Changes in fair value of derivatives
Total change in fair value	$ 33,000	$ (145,000)