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Related Party Transactions - Summary of Related Party Transactions and Balances (Details) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2013
Related Party Transactions [Abstract]
CEHL, accounts receivable	$ 1,026
CEHL, other current assets	624cak_OtherCurrentAssetsRelatedParty
CEHL, accounts payable	292
CEHL, note payable-related party	6,496	6,496
CEHL, accrued expenses	804
CEHL, long-term note payable-related party	872
CEHL, total operating (income) and expenses	(1,167)us-gaap_CostsAndExpensesRelatedParty
CEHL, other expense, net	$ 99us-gaap_InterestExpenseRelatedParty

Amount for accounts payable to related parties.

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- Definition

For an unclassified balance sheet, amount of receivables arising from transactions with related parties.

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- Definition

The amount for notes payable (written promise to pay), due to related parties. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).

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- Definition

The amount for notes payable (written promise to pay), payable to related parties, which are due after one year (or one business cycle).

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