Financing Arrangements (Details) - USD ($)	1 Months Ended
	Mar. 31, 2016	Apr. 12, 2017	Mar. 31, 2017	Dec. 31, 2016
Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Credit agreement, current borrowing capacity	$ 250,000,000.0
Credit agreement, maximum borrowing capacity	300,000,000.0
Minimum fixed charge coverage ratio, minimum balance	$ 25,000,000.0
Minimum fixed charge coverage ratio, minimum percent	10.00%
Line of Credit Facility, Remaining Borrowing Capacity			$ 82,000,000	$ 150,000,000
Amount outstanding				$ 0
Minimum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Unused capacity commitment fee	0.25%
Maximum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Unused capacity commitment fee	0.375%
London Interbank Offered Rate (LIBOR) [Member] | Minimum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.50%
London Interbank Offered Rate (LIBOR) [Member] | Maximum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	2.00%
Base Rate [Member] | Minimum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	0.50%
Base Rate [Member] | Maximum [Member] | Revolving Credit Facility [Member]
Line of Credit Facility [Line Items]
Basis spread on variable rate	1.00%
Subsequent Event [Member] | Convertible Debt [Member]
Line of Credit Facility [Line Items]
Debt instrument		$ 175,000,000
Interest rate		3.50%