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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) - USD ($)
$ in Thousands
 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Cash Flows from Operating Activities:    
Net income $ 18,154 $ 17,409
Adjustments to reconcile net income to net cash provided by operating activities:    
Depreciation and amortization 22,819 21,472
Stock-based compensation expense 3,045 2,992
Deferred income taxes (2,990) (3,030)
Gain on insurance recovery (1,531) (2,460)
Proceeds from insurance recovery 916 2,327
Provision for doubtful accounts 181 286
Other 626 450
Changes in operating assets and liabilities:    
Accounts receivable 1,508 1,330
Inventories 2,356 9,821
Customer deposits 4,531 9,418
Other assets and liabilities 1,977 (5,176)
Accounts payable and accrued liabilities (2,844) (7,603)
Net cash provided by operating activities 48,748 47,236
Cash Flows from Investing Activities:    
Capital expenditures (15,394) (25,292)
Maturities of investments 0 12,000
Proceeds from insurance recovery for destroyed property and equipment 1,045 2,312
Other 28 (3)
Net cash used in investing activities (14,321) (10,983)
Cash Flows from Financing Activities:    
Payments on lease obligations (2,577) (2,295)
Taxes on vested restricted shares (1,555) (883)
Dividends paid (8,223) (6,885)
Common stock purchased 0 (21,282)
Construction allowance receipts 1,350 0
Net cash used in financing activities (11,005) (31,345)
Increase in cash and cash equivalents during the period 23,422 4,908
Cash and cash equivalents at beginning of period 63,481 70,659
Cash and cash equivalents at end of period $ 86,903 $ 75,567