Goodwill and Other Intangible Assets - Additional Information (Detail) (USD $)	3 Months Ended		9 Months Ended		1 Months Ended	3 Months Ended	9 Months Ended	3 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	Aug. 31, 2013 Glacier Park [Member]	Sep. 30, 2013 Glacier Park [Member]	Sep. 30, 2013 Preferred Supplier Agreement [Member]	Sep. 30, 2013 Noncontrolling Interest [Member] Glacier Park [Member]
Finite-Lived Intangible Assets [Line Items]
Contract related intangible asset							$ 2,100,000
Intangible asset amortization expense	318,000	187,000	930,000	508,000
Goodwill impairment loss	$ 4,461,000		$ 4,461,000		$ 4,461,000	$ 4,461,000		$ 892,000