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Summary Of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2015
Accounting Policies [Abstract] |
Calculation of Basic and Diluted Earnings per Share | The following table sets forth the calculation of basic and diluted earnings per s hare.
|  |  | Year Ended December 31,
(in thousands, except per share data) |  | 2015 |  | 2014 |  | 2013
Net income | $ | 95,401 | $ | 81,241 | $ | 110,945
Denominator for basic earnings per share – weighted- |  |  |  |  |  |
| average number of common shares outstanding |  |  |  |  |  |
| during the period |  | 51,573 |  | 53,538 |  | 54,213
Incremental common shares attributable to exercise of |  |  |  |  |  |
| dilutive options |  | 318 |  | 450 |  | 324
Incremental common shares attributable to outstanding |  |  |  |  |  |
| restricted shares and restricted stock units |  | 197 |  | 234 |  | 242
Denominator for diluted earnings per share |  | 52,088 |  | 54,222 |  | 54,779
Basic earnings per share | $ | 1.85 | $ | 1.52 | $ | 2.05
Diluted earnings per share | $ | 1.83 | $ | 1.50 | $ | 2.03
Schedule Of Unrecognized Compensation Cost And Remaining Weighted-Average Amortization Stock-Based Awards |
|  |  |  |  |  |  |  | Performance-
|  |  |  |  |  |  |  | based
|  |  |  |  |  | Restricted |  | Restricted
|  | Stock |  | Restricted |  | Stock |  | Stock
(in thousands) |  | Options |  | Shares |  | Units |  | Units(1)
Unrecognized compensation cost | $ | 4,194 | $ | 84 | $ | 7,169 | $ | 2,301
Remaining weighted-average |  |  |  |  |  |  |  |
amortization period |  | 1.6 years |  | 0.1 years |  | 2.2 years |  | 1.8 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 |
|  |  | Year Ended December 31,
(in thousands) |  | 2015 |  | 2014 |  | 2013
| Options granted |  | 289 |  | 378 |  | 348
| Expected term of options |  | 6.4 years |  | 7.0 years |  | 7.4 years
| Expected volatility |  | 35% |  | 39% |  | 42%
| Risk-free interest rate |  | 1.886% |  | 2.081% |  | 1.396%
| Dividend yield |  | zero |  | zero |  | zero
Schedule of Adjustments to Previously Reported Amounts | The effect on certain line items in the December 31, 2014 consolidated balance sheet was as follows:
|  | December 31, 2014
| (as previously |  |
(in thousands) |  | reported) |  |  | (as revised)
Prepaids and other assets | $ | 30,453 |  | $ | 29,018
Income taxes payable |  | 5,470 |  |  | 5,450
Retained earnings | $ | 645,500 |  | $ | 644,085
The effect on certain line items in the 2014 and 2013 consolidated statements of income as previously reported was as follows:
|  | Year Ended |  | Year Ended
|  |  | December 31, 2014 |  | December 31, 2013
|  | (as previously |  |  |  | (as previously |  |
(in thousands) |  | reported) |  | (as revised) |  |  | reported) |  | (as revised)
Other expense | $ | (452) |  | $ | (1,673) |  | $ | (101) |  | $ | (315)
Income tax expense |  | 17,408 |  |  | 17,388 |  |  | 5,018 |  |  | 5,018
Net income | $ | 82,442 |  | $ | 81,241 |  | $ | 111,159 |  | $ | 110,945
Earnings per share: |  |  |  |  |  |  |  |  |  |  |
| Basic | $ | 1.54 |  | $ | 1.52 |  | $ | 2.05 |  | $ | 2.05
| Diluted | $ | 1.52 |  | $ | 1.50 |  | $ | 2.03 |  | $ | 2.03
The effect on cert ain line items in the 2014 and 2013 consolidated statements of cash flows as previously reported was as follows:
|  | December 31, 2014 |  |  | December 31, 2013
| (as previously |  |  |  | (as previously |  |
(in thousands) |  | reported) |  |  | (as revised) |  |  | reported) |  |  | (as revised)
Net cash provided by operations | $ | 136,601 |  | $ | 135,440 |  | $ | 99,077 |  | $ | 98,863
Effect of exchange rate changes | $ | (2,483) |  | $ | (1,262) |  | $ | 724 |  | $ | 938

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- Definition Tabular disclosure of the significant assumptions used during the year to estimate the fair value of stock options, including, but not limited to: (a) expected term of share options and similar instruments, (b) expected volatility of the entity's shares, (c) expected dividends, (d) risk-free rate(s), and (e) discount for post-vesting restrictions. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (f)(2) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 + Details
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