The number of grants made during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average fair value at grant date for nonvested equity-based awards issued during the period on other than stock (or unit) option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, performance target plan).

+ References

+ Details

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- Definition

The number of non-vested equity-based payment instruments, excluding stock (or unit) options, that validly exist and are outstanding as of the balance sheet date.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average fair value of nonvested awards on equity-based plans excluding option plans (for example, phantom stock or unit plan, stock or unit appreciation rights plan, revenue or profit achievement stock award plan) for which the employer is contingently obligated to issue equity instruments or transfer assets to an employee who has not yet satisfied service or performance criteria necessary to gain title to proceeds from the sale of the award or underlying shares or units.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The number of equity-based payment instruments, excluding stock (or unit) options, that vested during the reporting period.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average fair value as of grant date pertaining to an equity-based award plan other than a stock (or unit) option plan for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(2)(iii)(2)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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Share-Based Compensation - Summary of Restricted Share and Restricted Stock Unit Activity (Details) (USD $)	12 Months Ended			0 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Oct. 28, 2014
Number of Shares
Unvested Number of Shares, Beginning (in shares)	130,914	114,703	103,615
Granted (in shares)	4,000	83,450	83,617
Vested (in shares)	(134,914)	(66,639)	(71,244)
Unvested Number of Shares, Ending (in shares)	0	130,914	114,703
Weighted Average Grant Date Fair Value
Unvested Shares, Weighted Average Grant Date Fair Value, Beginning (in dollars per share)	$ 20.70	$ 19.39	$ 23.32
Granted (in dollars per share)	$ 23.46	$ 23.29	$ 15.99
Vested (in dollars per share)	$ 25.79	$ 23.06	$ 15.75
Unvested Shares, Weighted Average Grant Date Fair Value, Ending (in dollars per share)	$ 0.00	$ 20.70	$ 19.39
Restricted shares
Number of Shares
Unvested Number of Shares, Beginning (in shares)	0
Granted (in shares)	713,727
Vested (in shares)	(3,545)
Unvested Number of Shares, Ending (in shares)	710,182
Weighted Average Grant Date Fair Value
Unvested Shares, Weighted Average Grant Date Fair Value, Beginning (in dollars per share)	$ 0.00
Granted (in dollars per share)	$ 26.66			$ 26.66
Vested (in dollars per share)	$ 26.66
Unvested Shares, Weighted Average Grant Date Fair Value, Ending (in dollars per share)	$ 0.00
Restricted stock units
Number of Shares
Unvested Number of Shares, Beginning (in shares)	0
Granted (in shares)	1,266,237
Vested (in shares)	0
Unvested Number of Shares, Ending (in shares)	1,266,237
Weighted Average Grant Date Fair Value
Unvested Shares, Weighted Average Grant Date Fair Value, Beginning (in dollars per share)	$ 0.00
Granted (in dollars per share)	$ 15.99
Vested (in dollars per share)	$ 0.00
Unvested Shares, Weighted Average Grant Date Fair Value, Ending (in dollars per share)	$ 0.00