Consolidated Statement of Changes in Shareholders' Equity - USD ($) $ in Thousands	TNH Common Stock	TNH Total Diplomat Pharmacy, Inc. Shareholders' Equity	TNH	Several Acquisitions Common Stock	Several Acquisitions Total Diplomat Pharmacy, Inc. Shareholders' Equity	Several Acquisitions	Common Stock	Additional Paid-In Capital	Retained Earnings	Accumulated Other Comprehensive Loss	Total Diplomat Pharmacy, Inc. Shareholders' Equity	Noncontrolling Interest	Total
Balance at Dec. 31, 2015							$ 451,620	$ 29,221	$ 31,130		$ 511,971	$ 3,575	$ 515,546
Balance (in shares) at Dec. 31, 2015							64,523,864
Changes in Shareholders' Equity
Cumulative effect adjustment, excess tax benefits on share-based awards (Note 12)									16,903		16,903		16,903
Net income (loss)									28,273		28,273	(3,253)	25,020
Issuance of stock upon full contingent consideration payout (in shares)							1,346,282
Issuance of stock as partial consideration	$ 9,507	$ 9,507	$ 9,507				$ 36,888				36,888		36,888
Issuance of stock as partial consideration (in shares)	324,244
Stock issued upon exercises of stock options							$ 5,526	(1,078)			4,448		4,448
Stock issued upon exercises of stock options (in shares)							564,844
Share-based compensation								5,412			5,412		5,412
Restricted stock award activity							$ 287	(287)
Restricted stock award activity (in shares)							5,765
Balance at Dec. 31, 2016							$ 503,828	33,268	76,306		613,402	322	613,724
Balance (in shares) at Dec. 31, 2016							66,764,999
Changes in Shareholders' Equity
Net income (loss)									15,510		15,510	$ (322)	15,188
Issuance of stock as partial consideration				$ 105,433	$ 105,433	$ 105,433
Issuance of stock as partial consideration (in shares)				5,852,291
Stock issued upon exercises of stock options							$ 9,752	(1,877)			7,875		7,875
Stock issued upon exercises of stock options (in shares)							1,217,320
Share-based compensation								7,281			7,281		7,281
Restricted stock award activity							$ 222	(222)
Restricted stock award activity (in shares)							36,814
Balance at Dec. 31, 2017							$ 619,235	38,450	91,816		749,501		$ 749,501
Balance (in shares) at Dec. 31, 2017							73,871,424						73,871,424
Balance at Dec. 31, 2017							$ 619,235	38,450	91,816		749,501		$ 749,501
Balance (in shares) at Dec. 31, 2017							73,871,424						73,871,424
Changes in Shareholders' Equity
Cumulative effect adjustment, new revenue recognition accounting standard (Note 2)									(126)		(126)		$ (126)
Net income (loss)									(302,269)		(302,269)		(302,269)
Stock issued upon exercises of stock options							$ 5,316	(1,218)			4,098		4,098
Stock issued upon exercises of stock options (in shares)							379,194
Share-based compensation								18,172			18,172		18,172
Stock issued upon vesting of restricted stock units							$ 4,299	(4,299)
Stock issued upon vesting of restricted stock units (in shares)							183,263
Restricted stock award activity							$ 561	(561)
Restricted stock award activity (in shares)							40,796
Other comprehensive loss, net of tax										$ (4,292)	(4,292)		(4,292)
Balance at Dec. 31, 2018							$ 629,411	$ 50,544	$ (210,579)	$ (4,292)	$ 465,084		$ 465,084
Balance (in shares) at Dec. 31, 2018							74,474,677						74,474,677