Maximum worth of stock that an employee can purchase per year.

No definition available.

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Maximum wage can be withhold per employee under the plan per year.

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Number of common shares vested immediately upon issuance related to deferred compensation arrangements with individuals.

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No definition available.

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The percentage of base wages withheld for the purchase of stock under a share based compensation plan.

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Number of additional shares remaining and authorized for issuance under an established share-based compensation plan.

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The number of options that were modified by extending the term during the period.

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No definition available.

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Changes in additional paid in capital related to exercise of share-based payments awards (such as stock options) and the amount of recognized equity-based compensation during the period (such as nonvested shares).

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No definition available.

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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.

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Unrecognized cost of unvested share-based compensation awards.

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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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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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Discount rate from fair value on offering date that participants pay for shares.

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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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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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Number of additional shares authorized for issuance under an established share-based compensation plan.

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No definition available.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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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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Amount of accumulated difference between fair value of underlying shares on dates of exercise and exercise price on options exercised (or share units converted) into shares.

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For presentations that combine terminations, the number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan or that expired.

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

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No definition available.

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Number of options outstanding, including both vested and non-vested options.

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Number of share instruments newly issued under a share-based compensation plan.

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Percentage of vesting of share-based compensation awards.

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- Definition

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

Number of shares issued during the period as a result of an employee stock purchase plan.

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Number of share options (or share units) exercised during the current period.

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Aggregate value of stock related to Restricted Stock Awards issued during the period.

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Stock Options, Employee Stock Purchase Plan and Restricted Stock (Details) - USD ($)						3 Months Ended									6 Months Ended			9 Months Ended			12 Months Ended
	Sep. 05, 2014	May. 02, 2014	May. 04, 2013	May. 03, 2013	Jul. 08, 2004	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2013	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	May. 03, 2014	Aug. 07, 2009	May. 27, 2005
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number						4,338,000												4,338,000			4,762,000	6,386,000	9,228,000	9,727,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross																		577,000			1,016,000	1,475,000	321,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period																		2,519,000			2,519,000	4,226,000	630,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period																		106,000			121,000	91,000	190,000
Allocated Share-based Compensation Expense (in Dollars)						$ 3,341,000	$ 3,157,000	$ 2,974,000	$ 1,790,000	$ 1,992,000	$ 1,282,000	$ 1,430,000	$ 2,541,000	$ 1,703,000	$ 6,131,000	$ 3,275,000	$ 4,244,000	$ 9,471,000	$ 5,065,000	$ 5,674,000	$ 13,100,000	$ 7,800,000	$ 7,100,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value (in Dollars)																					97,400,000	141,700,000	8,900,000
Adjustments to Additional Paid in Capital, Share-based Compensation and Exercise of Stock Options (in Dollars)																					10,200,000	8,100,000	2,600,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars)																					$ 27,200,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition																					2 years 9 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period
Stock Issued During Period, Value, Restricted Stock Award, Gross (in Dollars)																					$ 3,814,000	1,188,000	579,000
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date																					15.00%
2003 Stock Option Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number																									0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross					2,519,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized																											11,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period													93,000				270,000
Amended 2003 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number																					2,444,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross																					15,828,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized																									19,000,000			5,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Additional Shares Authorized																									8,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period																					9,048,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period																					4,336,000
The 2003 Plan and Amended 2003 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period																					5 years
2014 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number																					2,317,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Gross																					2,491,000
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized		7,500,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period																					0
Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures and Expirations in Period																					174,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period																					4 years
Employee Stock Purchase Plan (ESPP) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized																					2,000,000
Allocated Share-based Compensation Expense (in Dollars)																					$ 600,000	$ 400,000	$ 200,000
Share-based Compensation Arrangement by Share-based Payment Award, Shares Issued in Period																					1,420,438
Share Based Compensation Arrangement By Share Based Payment Award Number of Shares Authorized Remaining																					579,562
Stock Issued During Period, Shares, Employee Stock Purchase Plans																					0	67,000	73,000
Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	8,034
Senior Management [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	257,416	71,582
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		25.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Modified in Period (in Dollars)		2,300,000
Minimum \| 2014 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period																					5 years
Minimum \| Employee Stock Purchase Plan (ESPP) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Base Wages Withheld for Purchase of Stock																					1.00%
Maximum \| 2014 Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period																					10 years
Maximum \| Employee Stock Purchase Plan (ESPP) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of Base Wages Withheld for Purchase of Stock																					15.00%
Annual Purchase of Stock Per Employee (in Dollars)																					$ 25,000
Base Wages Subject To Withholding Towards Stock Purchase (in Dollars)																					$ 21,250
Options Granted in 2014 [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period																					4 years
Options Granted in Earlier Years [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period																					3 years
Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Allocated Share-based Compensation Expense (in Dollars)						$ 1,110,000	$ 742,000	$ 722,000	$ 285,000	$ 92,000	$ 61,000	$ 104,000	$ 350,000	$ 64,000	$ 1,464,000	$ 153,000	$ 414,000	$ 2,573,000	$ 438,000	$ 518,000	$ 3,900,000	$ 1,200,000	$ 600,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized (in Dollars)																					$ 7,600,000
Employee Service Share-based Compensation, Nonvested Awards, Compensation Cost Not yet Recognized, Period for Recognition																					2 years 3 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period																72,000			337,000			337,000	32,000
Restricted Stock [Member] \| Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	8,034	71,582	31,899	31,899																				35,000
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage	25.00%
Deferred Compensation Arrangement With Individual Common Stock Vested Immediately Upon Issuance				15,946
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant																										15,953
Stock Issued During Period, Value, Restricted Stock Award, Gross (in Dollars)																								$ 500,000
Restricted Stock [Member] \| Management [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		25.00%
Restricted Stock [Member] \| Senior Management [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period	257,416	71,582
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights, Percentage		25.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Modified in Period (in Dollars)		2,300,000