Derivatives - Narrative (Details) - USD ($)	Sep. 30, 2016	Aug. 05, 2016	Dec. 31, 2015	Dec. 19, 2012
Derivative [Line Items]
Interest Rate Cash Flow Hedge Liability at Fair Value	$ (982,000)
Interest rate swap			$ 2,000
Cumulative changes in net gain (loss) from cash flow hedges, tax expense (benefit)	$ (382,000)		$ 1,000
Interest Rate Swap 1 | Interest rate swap
Derivative [Line Items]
Notional amount of derivative				$ 150,000,000
Derivative, Fixed Interest Rate				0.98%
Interest Rate Swap 2 | Interest rate swap
Derivative [Line Items]
Notional amount of derivative		$ 42,500,000.0
Derivative, Fixed Interest Rate		1.12%
Maximum | Interest Rate Swap 2 | Interest rate swap
Derivative [Line Items]
Notional amount of derivative		$ 175,000,000