Summary of Significant Accounting Policies - Narrative (Details)	12 Months Ended
	Jun. 30, 2015 USD ($) ft² shares	Jun. 30, 2014 USD ($) warehouse center shares	Jun. 30, 2013 USD ($) shares
Property, Plant and Equipment
Temporary Corporate Facility in Texas, Size | ft²	32,000
Goodwill, Acquired During Period	$ 272,000
Derivative instruments designated as cash flow hedges (percent)	94.00%	98.00%
Restricted cash	$ 1,002,000	$ 0
Decrease in allowance of accounts receivable	8,000		$ 757,000
Increase in allowance for doubtful accounts	(8,000)	80,000	(757,000)
Cost of goods sold	348,846,000	332,466,000	$ 328,693,000
Property, plant and equipment gross	$ 304,742,000	$ 293,341,000
Shares issuable under stock options | shares	139,524	104,956	0
Antidilutive securities excluded from computation of earnings per share (in shares) | shares	10,455	22,441	557,427
Impairment losses on goodwill and intangible assets	$ 0	$ 0	$ 92,000
Shipping and handling costs	8,300,000	8,400,000	7,300,000
Undiscounted workers' compensation liability	13,400,000	9,600,000
Reinsurance recoveries	2,500,000	1,200,000
Liability reserve for claims incurred	800,000	400,000
Security Deposit - Letter of Credit
Property, Plant and Equipment
Letter of credit posted as security deposit	$ 7,000,000	6,500,000
Workforce Subject to Collective Bargaining Arrangements
Property, Plant and Equipment
Concentration risk (percent)	34.00%
Coffee Brewing Equipment and Service
Property, Plant and Equipment
Cost of goods sold	$ 26,600,000	25,900,000	25,600,000
Deposits Held At CommodityTrading Accounts
Property, Plant and Equipment
Restricted cash	1,000,000	0
Health Insurance Product Line
Property, Plant and Equipment
Estimated liability related to Company's self-insured group medical insurance	1,000,000	$ 800,000
Maximum
Property, Plant and Equipment
Cash equivalents and short-term investments maturity period		180 days
Distribution Center
Property, Plant and Equipment
Number of real estate properties | center		5
Branch Warehouses
Property, Plant and Equipment
Number of real estate properties | warehouse		111
Building and Facilities
Property, Plant and Equipment
Property, plant and equipment gross	79,040,000	$ 77,926,000
Building and Facilities | Maximum
Property, Plant and Equipment
Property, plant and equipment useful life		30 years
Building and Facilities | Minimum
Property, Plant and Equipment
Property, plant and equipment useful life		10 years
Machinery and Equipment
Property, Plant and Equipment
Property, plant and equipment gross	$ 172,432,000	$ 162,030,000
Machinery and Equipment | Maximum
Property, Plant and Equipment
Property, plant and equipment useful life	05 years
Machinery and Equipment | Minimum
Property, Plant and Equipment
Property, plant and equipment useful life	03 years
Office Furniture and Equipment
Property, Plant and Equipment
Property, plant and equipment useful life	5 years
Property, plant and equipment gross	$ 15,005,000	15,049,000
Capitalized Software Costs
Property, Plant and Equipment
Property, plant and equipment useful life	3 years
Property, plant and equipment gross	$ 19,703,000	18,878,000
Coffee Brewing Equipment
Property, Plant and Equipment
Depreciation	10,400,000	10,900,000	$ 12,800,000
Property, plant and equipment gross	$ 10,700,000	$ 13,600,000