Income Taxes - Additional Information (Detail) (USD $)				12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Domestic Tax Authority [Member]	Dec. 31, 2013 Domestic Tax Authority [Member] Minimum [Member]	Dec. 31, 2013 State and Local Jurisdiction [Member]	Dec. 31, 2013 State and Local Jurisdiction [Member] Minimum [Member]
Income Taxes [Line Items]
Valuation allowance	$ 35,000	$ 1,611,000	$ 3,300,000
Deferred tax assets related to net operating losses for federal income tax purposes	23,705,000	49,001,000		45,200,000		7,900,000
Operating loss carryovers, expiration beginning year					2029		2015
Capital loss carryovers, utilized year				2013		2013
Ownership percentage	50.00%
Percentage increasing ownership	5.00%
Pre-tax net operating loss carryovers	70,600,000
Built-in losses annual Limitation	4,200,000
Future tax return benefits	19,600,000
Unrecognized tax benefits	31,000,000
Interest or penalties related to uncertain tax positions	$ 0	$ 0	$ 0