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Equity - Merger Transaction (Details) $ in Thousands	1 Months Ended	3 Months Ended												12 Months Ended
	Apr. 30, 2018 USD ($) shares	Dec. 31, 2020 USD ($)	Sep. 30, 2020 USD ($)	Jun. 30, 2020 USD ($)	Mar. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2019 USD ($)	Jun. 30, 2019 USD ($)	Mar. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Sep. 30, 2018 USD ($)	Jun. 30, 2018 USD ($)	Mar. 31, 2018 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) shares	Dec. 31, 2018 USD ($) shares
Class of Stock
Deferred tax assets net		$ 173,146				$ 131,521								$ 173,146	$ 131,521
Deferred tax asset valuation allowances		1,027				822								1,027	822
Merger-related costs															8,213	$ 10,162
Dividends paid to Archrock stockholders		$ 22,177	$ 22,308	$ 22,176	$ 22,171	$ 22,031	$ 22,062	$ 17,206	$ 17,231	$ 17,156	$ 17,114	$ 15,486	$ 8,532	$ 88,832	$ 78,530	$ 58,288
Partnership
Class of Stock
Ownership interest (percent)													43.00%
Public Unitholders | Partnership
Class of Stock
Ownership interest (percent)													57.00%
Common Stock
Class of Stock
Shares issued (in shares) | shares															21,656,683	57,634,005
Merger Transaction
Class of Stock
Amount of gain (loss) from merger	$ 0
Deferred tax assets resulting from merger	156,000									156,000						$ 156,000
Deferred tax assets net	52,200									52,200						52,200
Deferred tax asset valuation allowances	50,800									$ 50,800						50,800
Adjustments to additional paid in capital, deferred tax asset	$ 105,200
Merger-related costs															$ 500	$ 10,200
Merger Transaction | Common Stock
Class of Stock
Shares issued (in shares) | shares	57,600,000
Merger Transaction | Partnership
Class of Stock
Business acquisition, shares acquired (shares) | shares	41,200,000
Fair value of equity consideration	$ 625,300
Merger Transaction | Partnership | Common Stock
Class of Stock
Share conversion rate (per share)	1.40

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