Summary Of Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2016

Calculation of Basic and Diluted Earnings per Share

The following table sets forth the calculation of basic and diluted earnings per share.

			Year Ended December 31,
(in thousands, except per share data)			2016		2015		2014

Net income		$	64,047	$	95,401	$	81,241

Denominator for basic earnings per share – weighted-average number of
	common shares outstanding during the period		49,298		51,573		53,538
Incremental common shares attributable to exercise of dilutive options			313		318		450
Incremental common shares attributable to outstanding
	restricted stock units		214		197		234
Denominator for diluted earnings per share			49,825		52,088		54,222
Basic earnings per share			$ 1.30		$ 1.85		$ 1.52
Diluted earnings per share			$ 1.29		$ 1.83		$ 1.50

Schedule Of Unrecognized Compensation Cost And Remaining Weighted-Average Amortization Stock-Based Awards

As of December 31, 2016, the unrecognized compensation cost and remaining weighted-average amortization related to stock-based awards were as follows:

				Performance-
				based
			Restricted	Restricted
		Stock	Stock	Stock
(in thousands)		Options	Units	Units⁽¹⁾
	Unrecognized compensation cost	$ 1,901	$ 8,967	$ 1,955
	Remaining weighted-average amortization period	1.1 years	2.2 years	1.9 years

⁽¹⁾ Based on the probable achievement of the performance goals identified in each award.

Summary Of Weighted-Average Assumptions Used To Value Option Grants

The weighted-average assumptions used to value the options granted during 2015 and 2014 were as follows:

		Year Ended December 31,
(in thousands)		2015	2014
	Options granted	289	378
	Expected term of options	6.4 years	7.0 years
	Expected volatility	35%	39%
	Risk-free interest rate	1.886%	2.081%
	Dividend yield	zero	zero