XML 70 R34.htm IDEA: XBRL DOCUMENT
v2.4.1.9

Summary of Significant Accounting Policies - Weighted-Average Common Stock Used to Calculate Basic and Diluted Earnings Per Share (Detail) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Mar. 31, 2014 | Dec. 31, 2013 | Sep. 30, 2013 | Jun. 30, 2013 | Mar. 31, 2013 | Dec. 31, 2014 | Dec. 31, 2013 | Dec. 31, 2012
Earnings Per Share [Abstract] |  |  |  |  |  |  |  |  |  |  |
Weighted-average common stock for calculating basic earnings per share | 25,999 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 25,953 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 25,912 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 25,789 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 25,717 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 25,649 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 25,354 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 25,003 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 25,914 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 25,433 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic | 24,759 us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Effect of potentially dilutive securities from equity-based compensation |  |  |  |  |  |  |  |  | 261 us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment | 493 us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment | 397 us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment
Weighted-average common stock for calculating diluted earnings per share | 26,206 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 26,152 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 26,220 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 26,230 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 26,211 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 26,095 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 25,818 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 25,435 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 26,175 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 25,926 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding | 25,156 us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding

X
- Details
Name: | us-gaap_EarningsPerShareAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The sum of dilutive potential common shares or units used in the calculation of the diluted per-share or per-unit computation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 + Details
Name: | us-gaap_WeightedAverageNumberDilutedSharesOutstandingAdjustment
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition The average number of shares or units issued and outstanding that are used in calculating diluted EPS or earnings per unit (EPU), determined based on the timing of issuance of shares or units in the period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 16 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1505-109256 + Details
Name: | us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of [basic] shares or units, after adjustment for contingently issuable shares or units and other shares or units not deemed outstanding, determined by relating the portion of time within a reporting period that common shares or units have been outstanding to the total time in that period. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 260 -SubTopic 10 -Section 45 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=7655603&loc=d3e1448-109256 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Weighted-Average Number of Common Shares Outstanding -URI http://asc.fasb.org/extlink&oid=6528421 + Details
Name: | us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration