Shareholders' Equity (Narrative) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2013	Mar. 31, 2012	Mar. 31, 2013	Mar. 31, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based compensation expense	$ 585	$ 185	$ 1,162	$ 333
Option vesting period, years			3 years
Period from grant date in which options start to vest			3 months
Total intrinsic value of options	111	570	561	609
Proceeds from exercise of stock options	14		133	226
Unrecognized compensation costs related to non-vested stock option arrangements	153		153
Weighted-average period for RSUs expense			1 year 1 month 6 days
Annualized estimated forfeiture rate (in percent)			10.00%
Restricted stock compensation expense	545	142	1,081	246
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period from grant date			7 years
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expiration period from grant date			10 years
Restricted Stock Units RSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Option vesting period, years			3 years
Total number of unvested RSUs (in shares)			533,919
RSU vesting rate (in percent)	33.33%		33.33%
Number of restricted stock units subject to vesting condition, shares			533,919
Fair value of RSUs			2,347	651
Weighted-average fair value per share RSUs			$ 18.41	$ 4.84
Total unrecognized compensation cost	$ 5,000		$ 5,000
Weighted-average period for RSUs expense			2 years 4 months