Income Taxes - Additional Information (Detail) (USD $)	6 Months Ended		12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2013	Dec. 31, 2012	Jun. 30, 2011	Jun. 30, 2010
Income Taxes [Line Items]
Net operating losses, Federal			$ 364,900,000
Tax credit carryforwards			14,871,000	2,342,000
Net operating losses, State			192,600,000
Deferred tax assets, gross			92,435,000	19,032,000
Valuation allowance comparison	(100,000)	(2,200,000)	(12,500,000)	600,000	4,500,000
Undistributed earnings of foreign corporations not included in consolidated federal income tax returns			500,000	300,000
Total unrecognized tax benefit	710,000	447,000	4,810,000	1,725,000	519,000	374,000
Unrecognized tax benefits that would impact effective tax rate			900,000
Unrecognized tax benefits, income tax penalties accrued			400,000
Federal [Member]
Income Taxes [Line Items]
Tax credit carryforwards			10,700,000
Net operating losses, Expiration			Dec. 31, 2024
Net operating losses related to stock based compensation			356,900,000
State [Member]
Income Taxes [Line Items]
Tax credit carryforwards			7,300,000
Net operating losses, Expiration			Dec. 31, 2018
Net operating losses related to stock based compensation			164,800,000
Foreign Tax Authority [Member]
Income Taxes [Line Items]
Deferred tax assets, gross			$ 1,000,000