Deferred Revenue - Components Of Deferred Revenue (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2014	Dec. 31, 2013
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 66,382	$ 61,188
Loyalty programs [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	57,757	53,875
Initial, relicensing and franchise fees [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	6,439	5,354
Procurement services fees [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	1,936	1,504
Other [Member]
Deferred Revenue Arrangement [Line Items]
Deferred revenue	$ 250	$ 455