Bank Service Charge

No definition available.

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- Definition

Value of stock issued in connection with acquisition.

+ References

No definition available.

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- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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-Publisher FASB

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- Definition

Amount of increase (decrease) in the value of a contingent consideration liability, including, but not limited to, differences arising upon settlement.

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-Publisher FASB

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- Definition

The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

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- Definition

Amount before tax of foreign currency transaction realized and unrealized gain (loss) recognized in the income statement.

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- Definition

Sum of operating profit and nonoperating income or expense before Income or Loss from equity method investments, income taxes, extraordinary items, and noncontrolling interest.

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- Definition

Amount after accretion (amortization) of discount (premium), and investment expense, of interest income and dividend income on nonoperating securities.

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- Definition

The net result for the period of deducting operating expenses from operating revenues.

+ References

No definition available.

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- Definition

This element represents a sum total of expenses not separately reflected on the income statement for the period.

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- Definition

Revenues from the sale of other goods or rendering of other services, not elsewhere specified in the taxonomy; net of (reduced by) sales adjustments, returns, allowances, and discounts.

+ References

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- Definition

A fee charged for services from professionals such as doctors, lawyers and accountants. The term is often expanded to include other professions, for example, pharmacists charging to maintain a medicinal profile of a client or customer.

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- Definition

Amount of expense related to write-down of receivables to the amount expected to be collected. Includes, but is not limited to, accounts receivable and notes receivable.

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- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

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- Definition

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock or unit options, amortization of restricted stock or units, and adjustment for officers' compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

+ References

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- Definition

Taxes, excluding payroll, income and excise taxes, if not included elsewhere, that could include production, real and personal property, and other selling and distribution-related taxes.

+ References

No definition available.

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OPERATING SEGMENTS (Reconciliation of Segment Revenues and Operating Profit to Consolidated Income From Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									$ 730,027us-gaap_Revenues	$ 555,117us-gaap_Revenues	$ 433,799us-gaap_Revenues
Segment Reporting Information [Line Items]
Total segment operating profit:	24,015us-gaap_OperatingIncomeLoss	21,835us-gaap_OperatingIncomeLoss	18,476us-gaap_OperatingIncomeLoss	21,857us-gaap_OperatingIncomeLoss	23,192us-gaap_OperatingIncomeLoss	20,230us-gaap_OperatingIncomeLoss	17,535us-gaap_OperatingIncomeLoss	15,536us-gaap_OperatingIncomeLoss	86,183us-gaap_OperatingIncomeLoss	76,493us-gaap_OperatingIncomeLoss	66,006us-gaap_OperatingIncomeLoss
Stock-based compensation expense									(24,620)us-gaap_ShareBasedCompensation	(13,150)us-gaap_ShareBasedCompensation	(6,826)us-gaap_ShareBasedCompensation
Depreciation and amortization	(2,833)us-gaap_DepreciationAndAmortization	(5,510)us-gaap_DepreciationAndAmortization	(5,451)us-gaap_DepreciationAndAmortization	(3,689)us-gaap_DepreciationAndAmortization	(3,743)us-gaap_DepreciationAndAmortization	(3,906)us-gaap_DepreciationAndAmortization	(3,854)us-gaap_DepreciationAndAmortization	(3,617)us-gaap_DepreciationAndAmortization	(17,483)us-gaap_DepreciationAndAmortization	(15,120)us-gaap_DepreciationAndAmortization	(10,882)us-gaap_DepreciationAndAmortization
Provision for bad debts									(1,325)us-gaap_ProvisionForDoubtfulAccounts	(619)us-gaap_ProvisionForDoubtfulAccounts	(1,244)us-gaap_ProvisionForDoubtfulAccounts
Interest and other income, net	1,368us-gaap_InvestmentIncomeNet	1,261us-gaap_InvestmentIncomeNet	1,164us-gaap_InvestmentIncomeNet	976us-gaap_InvestmentIncomeNet	832us-gaap_InvestmentIncomeNet	846us-gaap_InvestmentIncomeNet	769us-gaap_InvestmentIncomeNet	630us-gaap_InvestmentIncomeNet	4,769us-gaap_InvestmentIncomeNet	3,077us-gaap_InvestmentIncomeNet	1,941us-gaap_InvestmentIncomeNet
Change in fair value of contingent consideration	(1,924)	0	0	0	0	0	0	0	(1,924)	0	0
Foreign exchange loss	1,123	(718)	(1,239)	(1,241)	(712)	(720)	(869)	(499)	(2,075)	(2,800)	(2,084)
Income before provision for income taxes	24,582	22,378	18,401	21,592	23,312	20,356	17,435	15,667	86,953	76,770	65,863
Operating Segments
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									730,003	555,043	433,722
Segment Reporting Information [Line Items]
Total segment operating profit:									144,619	109,308	87,455
Unallocated Amounts
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									24	74	77
Segment Reporting Information [Line Items]
Other revenues									24	74	77
Stock-based compensation expense									(24,620)	(13,150)	(6,826)
Non-corporate taxes									(6,882)	(3,201)	(2,346)
Professional fees									(5,312)	(3,651)	(2,850)
Depreciation and amortization									(7,988)	(2,829)	(1,100)
Bank charges									(1,049)	(1,194)	(1,136)
Asset impairment									(5,983)	0	0
Stock charge									0	0	(640)
Provision for bad debts									0	(36)	0
Other corporate expenses									$ (6,626)	$ (8,828)	$ (6,628)