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Consolidated Statements of Cash Flows
$ in Thousands
 12 Months Ended
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Cash flows from operating activities:      
Net income $ 30,498 $ 32,192 $ 35,939
Adjustments to reconcile net income to net cash provided by operating acitivites:      
Depreciation 18,704 19,792 18,653
Amortization 25,175 25,942 29,214
Stock-based compensation 7,499 9,330 5,593
Deferred income taxes 2,251 (284) 7,218
Income tax benefit of stock option exercises 3,961 644 1,097
Excess tax benefit from stock option exercises (4,081) (922) (1,518)
Loss on early extinguishment of debt 0 0 263
Increase (decrease) in cash flows from changes in assets and liabilities, net of effects from acquisitions:      
Accounts receivable (9,643) 5,255 (798)
Inventories (34,536) (20,940) (1,817)
Accounts payable 11,508 (3,449) 4,223
Income taxes (1,357) 5,291 (1,098)
Accrued compensation and benefits (3,964) 3,572 (71)
Other assets 3,950 (546) (5,222)
Other liabilities (1,897) (10,701) (10,727)
Total operating 17,570 32,984 45,010
Net cash provided by operating activities 48,068 65,176 80,949
Cash flows from investing activities:      
Payments related to business acquisitions and asset acquisitions, net of cash acquired (9,353) (5,265) 0
Purchases of property, plant and equipment (15,009) (15,411) (18,445)
Net cash used in investing activities (24,362) (20,676) (18,445)
Cash flows from financing activities:      
Net proceeds from common stock issued under employee plans 833 2,316 17,264
Repurchase of common stock 0 (16,862) (50,556)
Excess tax benefit from stock option exercises 4,081 922 1,518
Proceeds of senior credit agreement 30,680 27,000 55,000
Payments related to distribution agreement (16,667) (16,667) (34,000)
Payments on mortgage notes (1,234) (1,140) (1,050)
Payments on senior subordinated notes 0 0 (227)
Payments related to contingent consideration (3,876) 0 0
Payments related to debt issuance costs (1,485) 0 (1,725)
Dividends paid on common stock (22,105) (21,959) (16,696)
Other, net 0 0 (824)
Net cash provided by (used in) financing activities (9,773) (26,390) (31,296)
Effect of exchange rate changes on cash and cash equivalents (7,761) (6,221) (485)
Net increase (decrease) in cash and cash equivalents 6,172 11,889 30,723
Cash and cash equivalents at beginning of year 66,332 54,443 23,720
Cash and cash equivalents at end of year 72,504 66,332 54,443
Non-cash investing and financing activities:      
Contractual obligations for acquisition of a business 440 10,137 0
Dividends payable 5,542 5,510 5,545
Cash paid during the year for:      
Interest 5,434 5,532 5,143
Income taxes $ 10,261 $ 10,206 $ 6,837