Share-Based Payment Arrangements (Narrative) (Details) (USD $) | 9 Months Ended | 12 Months Ended | 9 Months Ended | | 9 Months Ended | | 9 Months Ended | | 9 Months Ended | 3 Months Ended | 9 Months Ended | | 0 Months Ended | 9 Months Ended |
Sep. 30, 2013 | Dec. 31, 2012 | Sep. 30, 2013 | 26-May-05 | Sep. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2013 | Sep. 30, 2013 | 30-May-13 | Apr. 10, 2013 | Jul. 27, 2012 | Sep. 30, 2013 |
Long Term Incentive Plan 2005 [Member] | Long Term Incentive Plan 2005 [Member] | Long Term Incentive Plan 2005 [Member] | Long Term Incentive Plan 2005 [Member] | Long Term Incentive Plan 2005 [Member] | Long Term Incentive Plan 2005 [Member] | Long Term Incentive Plan 2005 [Member] | Long Term Incentive Plan 2005 [Member] | Incentive Stock Options 2010 [Member] | Incentive Stock Options 2011 [Member] | Incentive Stock Options 2011 [Member] | Incentive Stock Options 2011 [Member] | Non Qualified Stock Options [Member] | Restricted Stock Units (RSUs) [Member] | Restricted Stock Units (RSUs) [Member] | Restricted Stock Units (RSUs) [Member] | Restricted Stock Units (RSUs) [Member] | Restricted Stock Units (RSUs) [Member] | Restricted Stock Units (RSUs) [Member] | Restricted Stock Units (RSUs) [Member] | Restricted Stock Units (RSUs) [Member] |
| | Minimum [Member] | Maximum [Member] | First Anniversary [Member] | Second Anniversary [Member] | Third Anniversary [Member] | Fourth Anniversary [Member] | Long Term Incentive Plan 2005 [Member] | 5,000 Grant [Member] | Long Term Incentive Plan 2005 [Member] | Long Term Incentive Plan 2005 [Member] | Long Term Incentive Plan 2005 [Member] | | | Minimum [Member] | Maximum [Member] | Long Term Incentive Plan 2005 [Member] | Long Term Incentive Plan 2005 [Member] | Long Term Incentive Plan 2005 [Member] | Long Term Incentive Plan 2005 [Member] |
| | Option Issued Prior to 2009 [Member] | Option Issued Prior to 2009 [Member] | Option Issued Prior to 2009 [Member] | Option Issued Prior to 2009 [Member] | Option Issued Prior to 2009 [Member] | Option Issued Prior to 2009 [Member] | | | 5,000 Grant [Member] | 10,000 Grant [Member] | | | | | | | | | |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Stock compensation plan, number of shares authorized | ' | ' | ' | 2,000,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Number of incentive stock options to purchase shares of common stock outstanding | ' | ' | 1,087,618 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Number of non-qualified stock options to purchase shares of common stock outstanding | ' | ' | 304,157 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 200,000 | ' | ' | ' | ' | ' | ' | ' | ' |
Number of restricted stock units to receive shares of common stock | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 355,277 |
Shares reserved for future issuance | ' | ' | 237,115 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Share-based payment award vesting rights | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | '3 years | ' | ' | '3 years | '7 years | ' | ' | ' | ' | ' | ' | ' | ' |
Percentage of restricted stock units granted as result of meeting growth rates | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 50.00% | 150.00% | ' | ' | ' | ' |
Number of options vested or expected to vest | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 25,000 | 5,000 | ' | 10,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Share-based payment, award vesting period | ' | ' | '6 months | ' | ' | ' | ' | ' | ' | ' | ' | ' | '7 years | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Incentive stock options termination period | ' | ' | '10 years | ' | '5 years | '10 years | ' | ' | ' | ' | '10 years | ' | '10 years | '10 years | '10 years | ' | ' | ' | ' | ' | ' | ' | ' |
Percentage of options vested or expected to vest | ' | ' | 100.00% | ' | ' | ' | 10.00% | 20.00% | 30.00% | 40.00% | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Total unrecognized compensation cost related to non-vested share-based compensation arrangements | $500,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | $600,000 | $600,000 | ' | ' | ' | ' | ' | ' |
Compensation costs expected to be recognized during remainder of 2013 | 52,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 67,000 |
Compensation costs expected to be recognized during year two | 200,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 300,000 |
Compensation costs expected to be recognized during year three | 200,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 200,000 |
Compensation costs expected to be recognized during year four | 54,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 53,000 |
Compensation costs expected to be recognized during year five | 3,000 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Stock Options, Granted | ' | 0 | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' |
Options granted, weighted average grant date fair value | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | $9.20 | $9.20 | ' | ' | ' | ' | ' | ' |
Other than options, granted | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 122,823 | 129,463 | 243,006 |
Other than options, forfeited | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | 9,280 | ' | ' | 6,155 |
Allocated share-based compensation expense | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | ' | $58,000 | $90,000 | ' | ' | ' | ' | ' | ' |