Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Antidilution

-URI http://asc.fasb.org/extlink&oid=6505113

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Diluted Earnings Per Share

-URI http://asc.fasb.org/extlink&oid=6510752

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Contingent Stock Agreement

-URI http://asc.fasb.org/extlink&oid=6508534

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 260

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Reference 3: http://www.xbrl.org/2003/role/presentationRef

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Net Income Per Share - Reconciliation of Common Shares Used for Basic and Diluted Earnings Per Share (Detail)	8 Months Ended	12 Months Ended	4 Months Ended	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2014	Apr. 30, 2013	Dec. 31, 2012
Successor [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average number of common shares used for basic earnings per share	45,003,925	45,093,304
Effect of potential dilutive shares:
Weighted average number of common shares and potential dilutive shares used for diluted earnings per share	46,302,734	46,933,253
Successor [Member] \| Employee Stock Option [Member]
Effect of potential dilutive shares:
Anti-dilutive shares excluded from reconciliation	855
Successor [Member] \| Restricted Stock Units (RSUs) [Member]
Effect of potential dilutive shares:
Effect of potential dilutive shares	1,189	37,812
Successor [Member] \| Performance Shares [Member]
Effect of potential dilutive shares:
Effect of potential dilutive shares	0	5,526
Successor [Member] \| Warrants [Member]
Effect of potential dilutive shares:
Effect of potential dilutive shares	1,297,620	1,786,804
Successor [Member] \| Employee Stock Option [Member]
Effect of potential dilutive shares:
Effect of potential dilutive shares	0	9,807
Predecessor [Member]
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Weighted average number of common shares used for basic earnings per share			302,469,544	302,468,867
Effect of potential dilutive shares:
Weighted average number of common shares and potential dilutive shares used for diluted earnings per share			302,579,245	302,468,867
Predecessor [Member] \| Employee Stock Option [Member]
Effect of potential dilutive shares:
Anti-dilutive shares excluded from reconciliation			475,550	805,999
Predecessor [Member] \| Restricted Stock Units (RSUs) [Member]
Effect of potential dilutive shares:
Effect of potential dilutive shares			109,701	0
Anti-dilutive shares excluded from reconciliation				71,295
Predecessor [Member] \| Performance Shares [Member]
Effect of potential dilutive shares:
Effect of potential dilutive shares			0	0
Predecessor [Member] \| Warrants [Member]
Effect of potential dilutive shares:
Effect of potential dilutive shares			0	0
Predecessor [Member] \| Employee Stock Option [Member]
Effect of potential dilutive shares:
Effect of potential dilutive shares			0	0