Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
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-Publisher SEC
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- Definition

Unrecognized cost of unvested share-based compensation awards.

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-Publisher FASB
-Name Accounting Standards Codification
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- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

The noncash expense that represents the cost of restricted stock or unit distributed to employees as compensation.

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-Publisher FASB
-Name Accounting Standards Codification
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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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- Definition

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).

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Fair value of share-based awards for which the grantee gained the right by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash.

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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No definition available.

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The difference between the maximum number of shares (or other type of equity) authorized for issuance under the plan (including the effects of amendments and adjustments), and the sum of: 1) the number of shares (or other type of equity) already issued upon exercise of options or other equity-based awards under the plan; and 2) shares (or other type of equity) reserved for issuance on granting of outstanding awards, net of cancellations and forfeitures, if applicable.

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Net number of share options (or share units) granted during the period.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Equity Incentive Plans - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting Period	5 years
Common stock, shares issued	445,512
Restricted stock expense	$ 408
Share based compensation expense	3,848
Unrecorded compensation expenses	$ 15,080
Weighted average remaining period of recognition (in years)	3 years 8 months 12 days
Restricted Stock Awards
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, shares issued	445,512	269,635
Total fair value of restricted stock awards	$ 2,961	$ 2,658	$ 1,871
Certain Employees of PAM
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, shares issued	102,462
Pingora
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, shares issued	102,462
2015 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Vesting Period	5 years
Awards relating to shares of common stock available for grant	1,176,333
Stock granted under plan period	10 years
2015 Plan \| Executive Officers, Employees and Manager
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, shares issued	323,667
2010 Plan
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Grants under the plan	0
2010 Plan \| Independent Directors
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Common stock, shares issued	19,383