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Goodwill and intangibles - Additional Information (Detail) (USD $) | 3 Months Ended | 12 Months Ended | 1 Months Ended | 3 Months Ended
--- | --- | --- | --- | ---
Mar. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011 | Dec. 31, 2013 Trademarks and Trade Name [Member] | Jan. 31, 2008 Below Market Lease [Member] | Jan. 31, 2008 Customer Relationships [Member] | Dec. 31, 2012 Customer Relationships [Member]
Goodwill [Line Items] |  |  |  |  |  |  |  |  |
Discount rate |  |  | 11.80% |  |  |  |  |  |
Terminal growth rate |  |  | 3.00% |  |  |  |  |  |
Carrying value of intangibles |  |  | $ 31,700,000 | $ 31,700,000 |  | $ 31,700,000 |  |  |
Impairment of trademarks and trade names |  |  |  |  |  | 0 |  |  |
Amortization expenses | 3,200,000 | 1,100,000 |  | 3,889,000 | 5,390,000 |  |  |  |
Amortization period |  |  |  |  |  |  | 60 months | 180 months |
Customer relationship intangible asset |  |  |  |  |  |  |  |  | $ 630,000

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- Definition Intangible assets amortization period. + References No definition available. + Details
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- Definition Reversal of customer relationship intangible asset. + References No definition available. + Details
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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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- Definition Amount of impairment loss resulting from write-down of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit to fair value. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16373-109275 + Details
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- Definition Sum of the carrying amounts of all intangible assets, excluding goodwill, as of the balance sheet date, net of accumulated amortization and impairment charges. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16212-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph ((a)(1),(b)) -URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275 + Details
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