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Consolidated Statements of Cash Flows (USD $) In Thousands, unless otherwise specified | 12 Months Ended
--- | ---
Dec. 31, 2013 | Dec. 31, 2012 | Dec. 31, 2011
CASH FLOWS FROM OPERATING ACTIVITIES: |  |  |
Net income | $ 252,195 | $ 209,942 | $ 149,922
Adjustments to reconcile net income to net cash provided by operating activities: |  |  |
Amortization of intangible assets | 1,700 | 398 | 153
Depreciation expense | 47,072 | 48,326 | 51,262
Stock-based compensation expense-restricted stock and stock units | 38,867 | 41,464 | 50,906
Excess tax benefits from stock-based compensation | (8,103) | (8,475) | (4,211)
Deferred income taxes | (13,259) | (14,993) | 17,156
Provision for doubtful accounts receivable | 7,467 | 7,133 | 6,673
Changes in assets and liabilities, net of effects of acquisitions: |  |  |
Increase in accounts receivable | (47,699) | (21,354) | (81,314)
Increase in accounts payable, accrued expenses, accrued payroll costs and retirement obligations | 38,356 | 16,672 | 64,932
(Decrease) increase in income taxes payable | (11,927) | 15,160 | 6,368
Change in other assets, net of change in other liabilities | 4,548 | (5,096) | (5,531)
Net cash flows provided by operating activities | 309,217 | 289,177 | 256,316
CASH FLOWS FROM INVESTING ACTIVITIES: |  |  |
Payment for acquisitions, net of cash acquired |  | (14,393) |
Capital expenditures | (53,725) | (50,056) | (56,535)
Increase in trusts for employee benefits and retirement plans | (44,052) | (8,577) | (6,867)
Net cash flows used in investing activities | (97,777) | (73,026) | (63,402)
CASH FLOWS FROM FINANCING ACTIVITIES: |  |  |
Repurchases of common stock | (167,975) | (176,794) | (168,103)
Cash dividends paid | (89,187) | (84,129) | (80,303)
Decrease in notes payable and other indebtedness | (4,496) | (107) | (91)
Excess tax benefits from stock-based compensation | 8,103 | 8,475 | 4,211
Proceeds from exercises of stock options | 33,285 | 42,939 | 18,309
Net cash flows used in financing activities | (220,270) | (209,616) | (225,977)
Effect of exchange rate changes on cash and cash equivalents | (3,041) | 1,764 | (2,738)
Net (decrease) increase in cash and cash equivalents | (11,871) | 8,299 | (35,801)
Cash and cash equivalents at beginning of period | 287,635 | 279,336 | 315,137
Cash and cash equivalents at end of period | 275,764 | 287,635 | 279,336
Cash paid during the year for: |  |  |
Interest | 315 | 405 | 536
Income taxes, net of refunds | 168,407 | 136,023 | 76,422
Non-cash items: |  |  |
Stock repurchases awaiting settlement |  | $ 5,942 | $ 2,466

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- Definition The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Investing Activities -URI http://asc.fasb.org/extlink&oid=6516133 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 13 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585 + Details
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- Definition The net cash inflow or outflow in aggregate debt due to repayments and proceeds from additional borrowings. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Financing Activities -URI http://asc.fasb.org/extlink&oid=6513228 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (j) -URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 14 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3255-108585 + Details
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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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.5) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 5 -Article 5 + Details
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- Definition The noncash expense that represents the cost of restricted stock or unit distributed to employees as compensation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585 + Details
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