CONDENSED CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Income Statement [Abstract]
Revenue	$ 248,983	$ 216,944	$ 510,741	$ 441,524
Provision for losses	91,986	65,446	173,017	127,182
Net revenue	156,997	151,498	337,724	314,342
Cost of providing services
Salaries and benefits	26,907	26,300	53,826	52,733
Occupancy	13,320	13,511	26,747	27,606
Office	6,077	4,936	13,057	9,804
Other costs of providing services	12,727	13,108	27,127	27,963
Advertising	17,554	11,641	27,310	19,329
Total cost of providing services	76,585	69,496	148,067	137,435
Gross margin	80,412	82,002	189,657	176,907
Operating expense
Corporate, district and other	38,655	36,557	79,109	69,550
Interest expense	20,465	18,484	42,814	41,850
Loss on extinguishment of debt	0	0	11,683	12,458
Total operating expense	59,120	55,041	133,606	123,858
Net income before income taxes	21,292	26,961	56,051	53,049
Provision for income taxes	5,317	10,619	16,784	20,069
Net income	$ 15,975	$ 16,342	$ 39,267	$ 32,980
Weighted average common shares outstanding:
Basic (in shares)	45,650	37,895	45,578	37,895
Diluted (in shares)	47,996	38,987	47,757	38,983
Net income per common share:
Basic earnings per share (in dollars per share)	$ 0.35	$ 0.43	$ 0.86	$ 0.87
Diluted earnings per share (in dollars per share)	$ 0.33	$ 0.42	$ 0.82	$ 0.85