Business Combinations - Estimated Fair Values of Aggregate Assets and Liabilities Acquired (Detail) (USD $)	Jun. 30, 2014	Jun. 30, 2013
Cash	$ 25,365,000
Other current assets	19,587,000	1,480,000
Fixed assets	9,241,000	31,000
Reinsurance recoverable	25,238,000
Prepaid reinsurance premiums	289,013,000
Goodwill	503,107,000	10,687,000
Purchased customer accounts	247,512,000	4,490,000
Non-compete agreements	1,300,000	62,000
Other assets	20,045,000
Total assets acquired	1,140,408,000	16,750,000
Other current liabilities	(15,602,000)	(902,000)
Losses and loss adjustment expense	(25,238,000)
Unearned premiums	(289,013,000)
Deferred income tax, net	(44,476,000)
Other liabilities	(32,694,000)
Total liabilities assumed	(407,023,000)
Net assets acquired	733,385,000	15,848,000
Pacific Resources Benefits Advisors, LLC [Member]
Other current assets	2,383,000
Fixed assets	53,000
Goodwill	70,255,000
Purchased customer accounts	26,460,000
Non-compete agreements	21,000
Total assets acquired	99,172,000
Other current liabilities	(353,000)
Total liabilities assumed	(353,000)
Net assets acquired	98,819,000
Axia Strategies, Inc. [Member]
Fixed assets	24,000
Goodwill	7,377,000
Purchased customer accounts	4,252,000
Non-compete agreements	41,000
Total assets acquired	11,694,000
Net assets acquired	11,694,000
The Wright Insurance Group, LLC. [Member]
Cash	25,365,000
Other current assets	16,768,000
Fixed assets	7,445,000
Reinsurance recoverable	25,238,000
Prepaid reinsurance premiums	289,013,000
Goodwill	417,539,000
Purchased customer accounts	213,958,000
Non-compete agreements	1,119,000
Other assets	20,045,000
Total assets acquired	1,016,490,000
Other current liabilities	(14,911,000)
Losses and loss adjustment expense	(25,238,000)
Unearned premiums	(289,013,000)
Deferred income tax, net	(44,476,000)
Other liabilities	(32,694,000)
Total liabilities assumed	(406,332,000)
Net assets acquired	610,158,000
Other Acquisitions [Member]
Other current assets	436,000	1,455,000
Fixed assets	1,719,000	1,000
Goodwill	7,936,000	(685,000)
Purchased customer accounts	2,842,000	170,000
Non-compete agreements	119,000	31,000
Total assets acquired	13,052,000	972,000
Other current liabilities	(338,000)	(47,000)
Total liabilities assumed	(338,000)
Net assets acquired	12,714,000	925,000
The Rollins Agency, Inc. [Member]
Fixed assets		30,000
Goodwill		13,019,000
Purchased customer accounts		3,876,000
Non-compete agreements		31,000
Total assets acquired		16,956,000
Other current liabilities		(858,000)
Net assets acquired		16,098,000
Arrowhead General Insurance Agency Superholding Corporation [Member]
Goodwill		(454,000)
Total assets acquired		(454,000)
Net assets acquired		(454,000)
Insurcorp & GGM Investments LLC [Member]
Goodwill		(566,000)
Purchased customer accounts		(268,000)
Total assets acquired		(834,000)
Net assets acquired		(834,000)
Richard W. Endlar Insurance Agency, Inc. [Member]
Goodwill		216,000
Purchased customer accounts		4,000
Total assets acquired		220,000
Net assets acquired		220,000
Texas Security General Insurance Agency, Inc. [Member]
Other current assets		25,000
Goodwill		(843,000)
Purchased customer accounts		708,000
Total assets acquired		(110,000)
Other current liabilities		3,000
Net assets acquired		$ (107,000)