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Exercise period given to the underwriters.

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Maximum additional shares granted to underwriters.

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Share Based Compensation Arrangements By Share Based Payment Award Options Exercise Price

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Share based compensation performance based stock award shares earned.

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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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Aggregate number of common shares reserved for future issuance.

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Total number of common shares of an entity that have been sold or granted to shareholders (includes common shares that were issued, repurchased and remain in the treasury). These shares represent capital invested by the firm's shareholders and owners, and may be all or only a portion of the number of shares authorized. Shares issued include shares outstanding and shares held in the treasury.

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Amount of deferred tax expense from write-off of the deferred tax asset related to deductible stock options at exercise.

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

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The cash inflow associated with the amount received from holders exercising their stock options. This item inherently excludes any excess tax benefit, which the entity may have realized and reported separately.

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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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Percentage of vesting of share-based compensation awards.

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

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

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Fair value of options vested. Excludes equity instruments other than options, for example, but not limited to, share units, stock appreciation rights, restricted stock.

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Weighted average grant-date fair value of options vested.

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Purchase price of common stock expressed as a percentage of its fair value.

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Price of a single share of a number of saleable stocks of a company.

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

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Number of new stock issued during the period.

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Stockholders' Equity and Share-Based Compensation - Additional Information (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended		12 Months Ended			0 Months Ended
	Jul. 25, 2013	Apr. 11, 2012	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Aug. 15, 2014	Jul. 01, 2014	Aug. 16, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock	4,500,000	4,000,000
Common stock, price per share	$ 18.00us-gaap_SharePrice	$ 13.00us-gaap_SharePrice
Common stock, shares authorized to the underwriters	675,000	600,000
Exercise period given to the underwriters	30 days	30 days
Common stock, shares authorized purchased by the underwriters		600,000us-gaap_CommonStockSharesIssued	24,935,103us-gaap_CommonStockSharesIssued	23,528,038us-gaap_CommonStockSharesIssued				675,000us-gaap_CommonStockSharesIssued
Net proceeds from the issuance of common stock	$ 88,043	$ 56,300	$ 55	$ 88,043	$ 56,566
Shares available for future grants under 2014 Incentive Stock Plan			1,063,806
Compensation expense, recognition period			1 year 7 months 6 days
Performance-based awards outstanding			600,000,000	607,500,000
Outstanding performance based stock award shares earned			262,941
Stock-based compensation expense			4,909	2,527	2,166
Total unrecognized compensation cost			2,867
Stock option expiration period			10 years
Options granted			0	0	0
Fair value of options vested			608	588	1,239
Exercised, Aggregate Intrinsic Value			70	232	245
Cash received from the options exercised			18	125	305
Cash tax benefits realized from stock awards exercised			28	88	93
Shares, aggregate grant date fair value of stock options			$ 1,430
Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Issuance of common stock				5,175,000	4,600,000
Number of shares issued			2,000
Digiplex [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Business combination share exchange ratio						0.1765
Digiplex [Member] \| Common Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Business combination share exchange ratio						0.1765
Aggregate common stock						1,382,000
Vesting Range One [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of stock options exercise price vested			25.00%
Vesting Range Two [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of stock options exercise price vested			30.00%
Vesting Range Three [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of stock options exercise price vested			35.00%
2004 Incentive Stock Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Options granted			260,000,000
Shares, Exercise price			$ 25.95
Employees Eligible For Retirement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense			1,913
Vice President [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock-based compensation expense					115
Employee Stock Option [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option, vesting period			3 years
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of options vested			$ 4,091	$ 1,617	$ 990
Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option, vesting period			3 years
Performance-based awards outstanding			360,199
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price percentage of common stock							90.00%
Number of shares issued			1,947,000
Number of shares available for future issuance			248,053,000
Minimum [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option, vesting period			1 year
Compensation expense, recognition period			1 year
Maximum [Member] \| Restricted Stock [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option, vesting period			3 years
Compensation expense, recognition period			3 years