Excess Reorganization Value, Goodwill and Other Intangibles - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended			6 Months Ended
	Jun. 30, 2014	Mar. 31, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Goodwill And Intangible Assets Disclosure [Abstract]
Goodwill	$ 441			$ 441
Finite-lived intangible assets	5,614			5,614
Weighted average life of finite-lived intangible assets				5 years
Amortization expense	346		525	691	925
Impairment of excess reorganization value and goodwill		$ 0