Equity Incentive Plans - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Feb. 27, 2024
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Conversion ratio			1
Unvested restricted common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards expected to vest in 2026 (in shares)	401,192		401,192
Awards expected to vest in 2027 (in shares)	271,922		271,922
Awards expected to vest in 2028 (in shares)	167,338		167,338
Awards expected to vest in 2029 (in shares)	1,261		1,261
Unrecognized compensation cost	$ 5.0		$ 5.0
Recognized period			24 months
Compensation expense (reversal)	$ 0.9	$ 0.6	$ 2.3	$ 4.5
Unvested restricted common stock \| Executive Officers
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accelerated compensation cost		2.0		2.0
Shares related to unvested PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards expected to vest in 2026 (in shares)	394,436		394,436
Awards expected to vest in 2027 (in shares)	427,274		427,274
Awards expected to vest in 2028 (in shares)	626,846		626,846
Unrecognized compensation cost	$ 6.0		$ 6.0
Recognized period			26 months
Compensation expense (reversal)	$ 0.9	0.4	$ 2.2	$ 3.8
Percentage of target award of maximum possible payout to executives (as a percent)			300.00%
Stock of common stock earned for the PSUs vested (as a percent)			101.26%	100.00%
Shares related to unvested PSUs \| Executive Officers
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accelerated compensation cost		1.8		$ 1.8
Long-term Incentive Plan Unit
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards expected to vest in 2026 (in shares)	46,709		46,709
Awards expected to vest in 2027 (in shares)	46,709		46,709
Unrecognized compensation cost	$ 0.6		$ 0.6
Recognized period			19 months
Compensation expense (reversal)	$ 0.1	0.1	$ 0.3	1.9
Long-term Incentive Plan Unit \| Executive Officers
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Accelerated compensation cost		$ 1.2		$ 1.2
Minimum \| Unvested restricted common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)			3 years
Minimum \| Shares related to unvested PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)			3 years
Minimum \| Shares related to unvested PSUs \| Executive Officers
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of total stockholder return for payout of shares			90.00%
Maximum \| Unvested restricted common stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)			5 years
Maximum \| Shares related to unvested PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of total stockholder return for payout of shares			30.00%
2024 Equity Incentive Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option and underwriting agreement, shares authorized (up to) (in shares)					7,900,000
Share based compensation arrangement by share based payment award number of shares issued or committed to issue (in shares)	2,513,961		2,513,961

DiamondRock Hospitality Co 10-Q