Derivatives and Hedging Activities - Narrative (Details) - USD ($)	3 Months Ended	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Jan. 31, 2017
Derivative [Line Items]
Gain on derivative instrument		$ 1,879,000	$ 0	$ 0
Ineffective portion of the change in fair value derivatives		0
Interest expense		116,212,000	$ 0	$ 0
Loss to be reclassified in next twelve months	$ (4,000,000)	(4,000,000)
Interest rate swaps
Derivative [Line Items]
Interest expense	400,000
Subsequent Events | Designated as Hedging Instrument | Interest rate swaps
Derivative [Line Items]
Notional amount					$ 700,000,000
Average fixed interest rate					1.964%
Cash Flow Hedging | Designated as Hedging Instrument | Interest rate swaps
Derivative [Line Items]
Notional amount	$ 500,000,000.0	$ 500,000,000.0
Average fixed interest rate	1.825%	1.825%
Interest rate minimum	0.75%	0.75%