Selected Quarterly Financial Data (Unaudited) - Summary of Selected Quarterly Financial Data (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended															6 Months Ended				9 Months Ended				12 Months Ended
	Dec. 31, 2016	Sep. 30, 2016	[1]	Jun. 30, 2016	[1]	Mar. 31, 2016	[1]	Dec. 31, 2015	[1]	Sep. 30, 2015	[1]	Jun. 30, 2015	[1]	Mar. 31, 2015	[1]	Jun. 30, 2016	[1]	Jun. 30, 2015	[1]	Sep. 30, 2016	[1]	Sep. 30, 2015	[1]	Dec. 31, 2016	Dec. 31, 2015	[1]	Dec. 31, 2014	[1]
Selected Quarterly Financial Data (Unaudited) [Abstract]
Net patient revenues	$ 88,946	$ 86,411		$ 88,433		$ 85,049		$ 84,881		$ 82,154		$ 81,451		$ 75,807		$ 173,482		$ 157,258		$ 259,893		$ 239,412		$ 348,839	$ 324,293		$ 299,009
Net revenues	90,864	88,344		90,430		86,908		86,724		84,049		83,288		77,241		177,338		160,529		265,682		244,578		356,546	331,302		305,074
Operating income	10,954	12,055		15,033		11,491		12,611		11,949		13,549		9,185		$ 26,524		$ 22,734		$ 38,579		$ 34,683		$ 49,533	$ 47,294		$ 45,768
Net income	6,510	6,134		7,671		5,953		6,265		6,974		7,957		5,293
Net income attributable to USPH shareholders	$ 5,247	$ 4,804		$ 6,012		$ 4,488		$ 4,761		$ 5,506		$ 6,334		$ 4,014
Basic and diluted net income per share attributable to common shareholders (in dollars per share)	$ 0.42	$ 0.38		$ 0.48		$ 0.36		$ 0.38		$ 0.44		$ 0.51		$ 0.33		$ 0.84		$ 0.84		$ 1.22		$ 1.28		$ 1.64	$ 1.66		$ 1.57
Shares used in computation - basic and diluted (in shares)	12,519	12,520		12,511		12,448		12,421		12,421		12,409		12,313

[1] as restated