CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Mar. 31, 2012
Cash Flows from Operating Activities:
Net income	$ 8,260	$ 2,457
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	5,342	4,644
Share-based compensation expense	803	666
Provision for doubtful accounts	13	66
Other	(216)	89
Changes in operating assets and liabilities:
Accounts receivable	586	788
Inventories	(665)	1,801
Customer deposits	(104)	3,604
Other assets and liabilities	(1,454)	1,934
Accounts payable and accrued liabilities	(7,176)	(4,857)
Net cash provided by operating activities	5,389	11,192
Cash Flows from Investing Activities:
Capital expenditures	(3,972)	(3,707)
Restricted cash and cash equivalents	(1)	(193)
Other investing activities	2	4
Net cash used in investing activities	(3,971)	(3,896)
Cash Flows from Financing Activities:
Payments on lease obligations	(216)	(185)
Dividends paid	(883)	0
Net cash used in financing activities	(1,099)	(185)
Increase in cash and cash equivalents during the period	319	7,111
Cash and cash equivalents at beginning of period	53,550	49,585
Cash and cash equivalents at end of period	$ 53,869	$ 56,696

Name:	us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Amount of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation.