Share-Based Compensation - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Mar. 31, 2017	Mar. 31, 2016	Jun. 30, 2016
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options	$ 100,000		$ 100,000		$ 400,000
Proceeds from stock option exercises			823,000	$ 1,610,000
Restricted Stock
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Unrecognized compensation cost related to restricted stock	300,000		300,000		$ 500,000
Restricted Stock | General and Administrative Expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Compensation expense recognized	0	$ 66,000	$ 200,000	100,000
Stock Options | General and Administrative Expense
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Compensation expense recognized	$ 14,000	0
NQOs
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Share price (in US$ per share)	$ 35.35		$ 35.35		$ 32.06
Fair value of options vested			$ 123,405.000000	200,000
Proceeds from stock option exercises			$ 500,000	1,300,000
NQOs | Farmer Bros. Co. Amended and Restated 2007 Long-term Incentive Plan
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Number of options granted (shares)			0
Stock options vested (in shares)			10,570
Stock option exercises (in shares)			58,324
Employee Service Share-based Compensation, Nonvested Awards, Weighted Average Remaining Amortization Period	1 year 5 months 27 days
Weighted average purchase price (in US$ per share)			$ 0.00
PNQs
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Stock options vested (in shares)			109,777
Fair value of options vested			$ 1,200,000
Proceeds from stock option exercises			$ 200,000	300,000
PNQs | Farmer Bros. Co. Amended and Restated 2007 Long-term Incentive Plan
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Number of options granted (shares)			149,223
Stock option exercises (in shares)			8,132
Employee Service Share-based Compensation, Nonvested Awards, Compensation Not yet Recognized, Stock Options	$ 2,100,000		$ 2,100,000		$ 1,900,000
Employee Service Share-based Compensation, Nonvested Awards, Weighted Average Remaining Amortization Period	1 year 5 months 16 days
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percent of Shares Forfeited if Performance Target Not Met			20.00%
Weighted average purchase price (in US$ per share)			$ 32.85
Compensation expense recognized		$ 200,000	$ 800,000	$ 300,000
Restricted Stock
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Restricted stock granted (in shares)			5,106
Restricted stock granted, weighted average grant date fair value (in US$ per share)			$ 35.25
Restricted Stock | Farmer Bros. Co. Amended and Restated 2007 Long-term Incentive Plan
Employee Service Share-based Compensation, Allocation of Recognized Period Costs
Employee Service Share-based Compensation, Nonvested Awards, Weighted Average Remaining Amortization Period	1 year 1 month 21 days