Shareholders' Equity - Summary of Share Count and Par Value Data Related to Shareholders' Equity (Details) - $ / shares None in scaling factor is -9223372036854775296	Jun. 28, 2015	Dec. 31, 2014	Jun. 29, 2014	Dec. 31, 2013
Preferred Stock
Preferred stock, par value per share
Preferred stock, shares authorized	25,000,000	25,000,000
Preferred stock, shares outstanding	0	0
Common Stock
Common stock, par value per share
Common stock, shares authorized	75,000,000	75,000,000
Common stock, shares issued	56,240,253	56,101,700
Common stock, shares outstanding	32,903,731	33,392,060	33,618,881	33,558,864
Treasury stock
Treasury stock, shares held	23,336,522	22,709,640