Excess Reorganization Value, Goodwill and Other Intangibles - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended			9 Months Ended
	Sep. 30, 2014	Mar. 31, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill	$ 441			$ 441
Finite-lived intangible assets	5,269			5,269
Weighted average life of finite-lived intangible assets				4 years 6 months
Amortization expense	346		774	1,037	1,699
Impairment of excess reorganization value and goodwill		$ 0