CONDENSED STATEMENT OF CASH FLOWS (USD $)	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities
Net loss	$ (673,955)
Increase (decrease) in cash attributable to changes in assets and liabilities
Prepaid expense	(81,369)
Due to related party	69,966
Franchise tax payable	180,000
Accrued expenses	80,822
Net cash used in operating activities	(424,536)
Net cash used in investing activities
Cash and investments held in Trust Account	(220,502,961)
Cash flows from financing activities
Proceeds from issuance of common stock to initial stockholder		25,000
Payment of offering costs	(5,024,117)us-gaap_PaymentsOfStockIssuanceCosts
Proceeds from the sale of warrants to Sponsor	6,160,000us-gaap_ProceedsFromIssuanceOfWarrants
Proceeds from Public Offering	210,000,000
Proceeds from the underwriter's partial exercise of their over-allotment option	10,500,000
Net cash provided by financing activities	221,635,883	25,000
Net increase in cash	708,386	25,000
Cash, beginning of period	25,000us-gaap_Cash
Cash, end of period	733,386us-gaap_Cash	25,000us-gaap_Cash
Supplemental schedule of non-cash financing activities
Deferred offering costs included in due to related party		118,875
Deferred underwriting fees	$ 7,717,500blvdu_DeferredUnderwritingFees

Future cash outflow to reimburse related party for payment of deferred offering costs incurred.

No definition available.

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- Definition

Represents the amount of deferred underwriting fees in an noncash transaction. "Part noncash" refers to that portion of the transaction not resulting in cash receipts or cash payments in the period.

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No definition available.

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- Definition

Represents the net cash inflow or outflow during the period for the aggregate increase (decrease) associated with funds that are not available for withdrawal or use and the amount of cash outflow used to acquire short-term held-to-maturity securities during the reporting period.

+ References

No definition available.

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- Definition

Represents the cash inflow from the underwriter's partial exercise of their over-allotment option during the period.

+ References

No definition available.

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- Definition

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Excludes cash and cash equivalents within disposal group and discontinued operation.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Cash

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-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

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-Article 5

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-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.1)

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- Definition

The increase (decrease) during the reporting period in the aggregate amount of expenses incurred but not yet paid.

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (a)

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- Definition

The increase (decrease) during the reporting period of all taxes owed but not paid, including income, property and other taxes.

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No definition available.

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The increase (decrease) during the reporting period in the aggregate amount of obligations to be paid to the following types of related parties: a parent company and its subsidiaries; subsidiaries of a common parent; an entity and trust for the benefit of employees, such as pension and profit-sharing trusts that are managed by or under the trusteeship of the entities' management; an entity and its principal owners, management, or member of their immediate families, affiliates, or other parties with the ability to exert significant influence.

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The increase (decrease) during the reporting period in the amount of outstanding money paid in advance for goods or services that bring economic benefits for future periods.

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- Definition

The increase (decrease) in cash associated with the entity's continuing operating, investing, and financing activities. While for technical reasons this element has no balance attribute, the default assumption is a debit balance consistent with its label.

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No definition available.

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Amount of cash inflow (outflow) of financing activities, excluding discontinued operations. Financing activity cash flows include obtaining resources from owners and providing them with a return on, and a return of, their investment; borrowing money and repaying amounts borrowed, or settling the obligation; and obtaining and paying for other resources obtained from creditors on long-term credit.

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- Definition

Amount of cash inflow (outflow) from operating activities, excluding discontinued operations. Operating activity cash flows include transactions, adjustments, and changes in value not defined as investing or financing activities.

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- Definition

Net income after adjustments for dividends on preferred stock (declared in the period) and/or cumulative preferred stock (accumulated for the period).

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- Definition

The cash outflow for cost incurred directly with the issuance of an equity security.

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-Glossary Financing Activities

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The cash inflow associated with the amount received from entity's first offering of stock to the public.

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- Definition

The cash inflow from the additional capital contribution to the entity.

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- Definition

The cash inflow from issuance of rights to purchase common shares at predetermined price (usually issued together with corporate debt).

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