Income Taxes - Significant Components of Deferred Tax Assets and Liabilities (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 28, 2013	Dec. 29, 2012
Deferred tax assets:
Inventory, receivable and warranty reserves	$ 13,290	$ 11,434
Net operating loss carryforwards	9,070	2,299
Tax credit carryforwards	11,258	7,764
Accrued employee benefits	3,709	2,167
Deferred profit	839	502
Stock-based compensation	3,972	3,409
Acquisition basis differences	2,105	2,226
Depreciation and fixed asset related	831	318
Other	121	243
Gross deferred tax assets	45,195	30,362
Less valuation allowance	(36,064)	(24,948)
Total deferred tax assets	9,131	5,414
Deferred tax liabilities:
Depreciation and fixed asset related	2,909	2,792
Acquisition basis differences	13,193	9,340
Other	461	283
Total deferred tax liabilities	16,563	12,415
Net deferred tax liabilities	$ (7,432)	$ (7,001)