Recently Adopted and Issued Accounting Guidance - Narrative (Details) $ in Millions	6 Months Ended
	Jun. 30, 2018 segment	Apr. 01, 2018 USD ($)
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Number of reportable segments | segment	2
Retained Earnings | Accounting Standards Update 2018-07
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cumulative effect adjustment on retained earnings		$ 1.1
Additional Paid-in Capital | Accounting Standards Update 2018-07
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Cumulative effect adjustment on retained earnings		$ (1.1)