Leases - Additional Disclosure (Details) $ in Thousands	1 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2014 USD ($) extension_option	Mar. 31, 2015 USD ($)	Sep. 30, 2016 USD ($)
Operating Leased Assets [Line Items]
Estimated minimum future rental payments			$ 265,156
Estimated future minimum sublease payments			18,884
Corporate Office Lease
Operating Leased Assets [Line Items]
Initial term of lease, in years	13 years
Renewable term of lease, in years	5 years
Annual rent at lease inception	$ 3,000
Annual rent in the terminal year of lease	$ 4,600
Number of extension options | extension_option	2
Estimated minimum future rental payments			51,300
Estimated future minimum sublease payments			$ 12,200
Sublease term			10 years
Regional Offices Sublease | Miami and Mexico City [Member]
Operating Leased Assets [Line Items]
Estimated future minimum sublease payments		$ 6,700
Regional Offices Sublease | Miami
Operating Leased Assets [Line Items]
Sublease term		9 years
Regional Offices Sublease | Mexico City
Operating Leased Assets [Line Items]
Sublease term		3 years
Minimum
Operating Leased Assets [Line Items]
Initial term of lease, in years			3 years
Renewable term of lease, in years			3 years
Maximum
Operating Leased Assets [Line Items]
Initial term of lease, in years			10 years
Renewable term of lease, in years			5 years