Summary of Significant Accounting Policies - Intangible Assets (Details)	3 Months Ended		6 Months Ended	12 Months Ended
	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2013	Dec. 31, 2015	Dec. 31, 2014
Employment Contracts [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life				9 years
Employment Contracts [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life				11 years
Trade Names [Member] | Minimum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life				10 years
Trade Names [Member] | Maximum [Member]
Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible asset, useful life				20 years
Regular Member [Member]
Finite-Lived Intangible Assets [Line Items]
Average member life (in months)	24 months	25 months	25 months	22 months	22 months