Consolidated statements of cash flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Cash flows from operating activities:
Net income	$ 71,247	$ 38,130	$ 37,295
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	31,502	32,158	32,341
Amortization of deferred financing costs	1,544	1,596	1,315
Amortization of favorable leases and asset retirement obligations	392	478	501
Amortization of interest rate caps	797	28
Deferred tax expense (benefit)	15,606	6,135	(63)
Loss (gain) on re-measurement of tax benefit arrangement	72	(2,549)
Provision for bad debts	59	667	139
Gain on disposal of property and equipment	(514)	(273)	(545)
Loss on extinguishment of debt	606		4,697
Third party debt refinancing expense	3,001
Equity-based compensation	1,728	4,877
Changes in operating assets and liabilities, excluding effects of acquisitions:
Accounts receivable	(7,754)	(414)	(3,632)
Notes receivable and due from related parties	1,897	4,210	177
Inventory	2,755	(1,545)	(769)
Other assets and other current assets	(7,944)	(5,720)	(1,818)
Accounts payable and accrued expenses	7,428	263	5,042
Other liabilities and other current liabilities	2,747	99	(2)
Income taxes	(5,993)	115	(1,670)
Payments to related parties pursuant to tax benefit arrangements	(6,922)
Equipment deposits	(3,417)	(1,088)	4,028
Deferred revenue	(652)	2,994	842
Deferred rent	632	1,502	1,527
Net cash provided by operating activities	108,817	81,663	79,405
Cash flows from investing activities:
Additions to property and equipment	(15,377)	(19,488)	(16,650)
Acquisition of franchises			(38,638)
Proceeds from sale of property and equipment	683	327	926
Net cash used in investing activities	(14,694)	(19,161)	(54,362)
Cash flows from financing activities:
Proceeds from issuance of Class A common stock sold in initial public offering, net of underwriting discounts and commissions		156,946
Use of proceeds from issuance of Class A common stock to purchase Holdings Units		(156,946)
Proceeds from issuance of long-term debt	230,000	120,000	390,000
Proceeds from issuance of Class A common stock	136
Principal payments on capital lease obligations	(46)	(376)	(1,162)
Repayment of long-term debt	(5,621)	(14,800)	(185,800)
Payment of deferred financing and other debt-related costs	(5,220)	(1,698)	(7,785)
Premiums paid for interest rate caps		(880)	(2,373)
Repurchase and retirement of Class B common stock	(1,583)
Distributions to variable interest entities			(458)
Dividend paid to holders of Class A common stock	(169,282)
Dividend equivalent paid to members of Pla-Fit Holdings	(101,729)	(140,000)	(173,900)
Distributions to members of Pla-Fit Holdings	(31,838)	(36,486)	(31,474)
Net cash used in financing activities	(85,183)	(74,240)	(12,952)
Effects of exchange rate changes on cash and cash equivalents	23	(123)	(67)
Net increase (decrease) in cash and cash equivalents	8,963	(11,861)	12,024
Cash and cash equivalents, beginning of period	31,430	43,291	31,267
Cash and cash equivalents, end of period	40,393	31,430	43,291
Supplemental cash flow information:
Net cash paid for income taxes	7,040	2,834	1,604
Cash paid for interest	24,302	23,220	20,756
Non-cash investing activities:
Non-cash consideration for acquisition of franchises			3,000
Non-cash additions to property and equipment	2,203	$ 207	1,049
Non-cash financing activities:
Non-cash distributions to members			$ 901
Non-cash dividend equivalent payments	$ 3,899