Excess Reorganization Value, Goodwill and Other Intangibles - Additional Information (Detail) - USD ($)	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	$ 441,000
Finite-lived intangible assets	$ 3,195,000
Weighted average life of finite-lived intangible assets	3 years
Finite-lived intangible assets, accumulated amortization	$ 5,583,000
Amortization expense	346,000	$ 346,000
Impairment of excess reorganization value and goodwill	$ 0