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Income Taxes Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Income Tax Examination [Line Items]
INCOME TAX PROVISION	$ 22,999,000	$ 16,210,000
Pretax income	$ 59,209,000	$ 39,833,000
Effective income tax rate	38.84%	40.69%
Unrecognized tax benefits			$ 2,200,000
Interest accrued	$ 331,000		306,000
Penalties accrued	0		$ 0
Decrease in unrecognized tax benefits is reasonably possible	1,000,000
Tax effects of issuance of shares from various stock plans	73,000
Series of Individually Immaterial Business Acquisitions [Member]
Income Tax Examination [Line Items]
Interest accrued	$ 100,000

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Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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-Publisher FASB
-Name Accounting Standards Codification
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The amount of estimated interest accrued as of the balance sheet date arising from income tax examinations.

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