Derivatives - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Sep. 30, 2017 USD ($)	Sep. 30, 2015 USD ($)	Jan. 31, 2014 USD ($)
Derivative [Line Items]
Payments to Settle Derivative Instruments	$ (3,149)	$ 0	$ 0
Settlement Gain on Derivative Instruments	0	$ 0	$ 1,896
2018 Treasury Locks
Derivative [Line Items]
Swaps, Number of Instruments Held		2
Derivative, Notional Amount		$ 100,000
Debt instrument, LIBOR Rate		ten year U.S. Treasury
Payments to Settle Derivative Instruments	$ 3,149
Swaps, Average Fixed Interest Rate		2.93%
2014 Swaps
Derivative [Line Items]
Swaps, Number of Instruments Held						4
Derivative, Notional Amount						$ 200,000
Debt instrument, LIBOR Rate	one month LIBOR
Swaps, Average Fixed Interest Rate						2.29%
2015 Swaps
Derivative [Line Items]
Swaps, Number of Instruments Held					6
Derivative, Notional Amount					$ 260,000
Debt instrument, LIBOR Rate	one month LIBOR
Swaps, Average Fixed Interest Rate					1.79%
2017 Treasury Locks
Derivative [Line Items]
Swaps, Number of Instruments Held				2
Derivative, Notional Amount				$ 100,000
Debt instrument, LIBOR Rate			ten year U.S. Treasury
Swaps, Average Fixed Interest Rate				2.18%
Settlement Gain on Derivative Instruments			$ 1,896