Business Combinations (Pro Forma) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Business Acquisition, Pro Forma Information
Operating revenue	$ 144,275	$ 124,626	$ 287,199	$ 232,856
Net Income (Loss) Attributable to Parent	$ 28,851	$ 29,180	$ 54,561	$ 55,388
Basic EPS	$ 0.95	$ 0.93	$ 1.79	$ 1.76
Diluted EPS	$ 0.94	$ 0.92	$ 1.78	$ 1.75
Operating revenue	$ 144,275	$ 124,626	$ 287,199	$ 232,856
Parent, ItzCAsh, beBetter, YouFirst, WallStreet, PML, Via, and Transcorp [Member]
Business Acquisition, Pro Forma Information
Revenue, pro forma	144,275	141,385	287,199	280,002
Net income, pro forma	$ 28,851	$ 26,319	$ 54,561	$ 48,826
Basic EPS, pro forma	$ 0.95	$ 0.84	$ 1.79	$ 1.55
Diluted EPS, pro forma	$ 0.94	$ 0.83	$ 1.78	$ 1.54