Legal and Other Proceedings - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended
	Nov. 25, 2014	Mar. 31, 2015
Loss Contingencies [Line Items]
Damages for breach of contract	$ 800,000
Additions to other significant pending legal or other proceedings		0
Minimum [Member]
Loss Contingencies [Line Items]
Reasonably possible losses for loan proceedings		0
Maximum [Member]
Loss Contingencies [Line Items]
Reasonably possible losses for loan proceedings		5,000,000
Goldstein Case [Member]
Loss Contingencies [Line Items]
Disputed amount		$ 5,000,000