CONSOLIDATED STATEMENT OF EQUITY (unaudited) - USD ($) $ in Thousands	Total	Common Stock	Paid-in Capital	Accumulated Other Comprehensive Income	Accumulated Deficit	Noncontrolling Interest
Balance at Dec. 31, 2017	$ 249,703	$ 32	$ 409,517	$ (114)	$ (158,678)	$ (1,054)
Balance (in shares) at Dec. 31, 2017	32,460,668
Increase/(Decrease) in Equity
Share issuances related to stock compensation plans	$ 2,486	$ 1	2,485
Share issuances related to stock compensation plans (in shares)		354,620
Stock-based compensation	2,065		2,065
Shares withheld to cover taxes on vesting of share based awards	(2,739)		2,739
Shares withheld to cover taxes on vesting of share based awards (in shares)		79,945
Acquisition of noncontrolling interests	0		0			0
Acquisition of noncontrolling interest (in shares)		58,786
Currency translation adjustment	(197)			(197)
Net income	5,036					(946)
Balance at Mar. 31, 2018	$ 256,354	$ 33	411,328	(311)	(152,696)	$ (2,000)
Balance (in shares) at Mar. 31, 2018	32,794,129
Increase/(Decrease) in Equity
Net income/(loss) attributable to BioTelemetry, Inc.	$ 5,982
Balance at Dec. 31, 2018	$ 310,485	$ 33	426,054	256	(115,858)
Balance (in shares) at Dec. 31, 2018	33,406,364	33,406,364
Increase/(Decrease) in Equity
Share issuances related to stock compensation plans	$ 4,311	$ 1	4,310
Share issuances related to stock compensation plans (in shares)		460,952
Stock-based compensation	2,549		2,549
Shares withheld to cover taxes on vesting of share based awards	(4,911)		4,911
Adjustments to Additional Paid in Capital, Other	8,890		8,890
Shares withheld to cover taxes on vesting of share based awards (in shares)		63,580
Currency translation adjustment	(2)			(2)
Net income	11,685
Balance at Mar. 31, 2019	$ 333,007	$ 34	$ 436,892	$ 254	$ (104,173)
Balance (in shares) at Mar. 31, 2019	33,803,736	33,803,736
Increase/(Decrease) in Equity
Net income/(loss) attributable to BioTelemetry, Inc.	$ 11,685