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Equity Incentive Plans (Details 1) - Restricted Stock
shares in Thousands
9 Months Ended
Sep. 30, 2016
$ / shares
shares
Shares  
Restricted stock outstanding shares, Beginning Balance | shares 863
Granted shares | shares 349
Vested shares | shares (258)
Forfeited/canceled shares | shares (51)
Restricted stock outstanding shares, Ending Balance | shares 903
Wtd. Avg. Grant Date Fair Value  
Restricted stock outstanding Wtd. Avg. Grant Date Fair Value, Beginning Balance (in dollars per share) | $ / shares $ 39.74
Granted Wtd. Avg. Grant Date Fair Value (in dollars per share) | $ / shares 30.43
Vested Wtd. Avg. Grant Date Fair Value (in dollars per share) | $ / shares 35.75
Forfeited/canceled Wtd. Avg. Grant Date Fair Value (in dollars per share) | $ / shares 38.58
Restricted stock outstanding Wtd. Avg. Grant Date Fair Value, Ending Balance (in dollars per share) | $ / shares $ 36.52